参考这个帖子：不同无编号章节的标题格式不同，我有以下代码：
\begin{filecontents*}{\jobname.bib}
@book{ bottero:1992,
author = "Bottero, Jean and Kramer, Samuel N.",
title = "Uomini e dèi della Mesopotamia",
publisher = "Einaudi",
location = "Torino",
year = "1992",
}
\end{filecontents*}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\documentclass[a4paper,twoside,12pt]{report}
\usepackage{fontspec}
\setmainfont{EB Garamond}
\usepackage{polyglossia}
\setmainlanguage[babelshorthands=true]{italian}
\PolyglossiaSetup{italian}{indentfirst=false}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{titlesec,titletoc}
\usepackage{etoolbox}
\titleformat{\chapter}[display]
{\normalfont\fontsize{11pt}{12pt}\selectfont}{\thechapter}{0pt}{}
\newcommand{\tocformat}{%
\titleformat{name=\chapter,numberless}[display]
{\normalfont\filleft\fontsize{12pt}{13pt}\selectfont}
{}
{0pt}%
{}%
}
\pretocmd\tableofcontents{\tocformat}{}{}
\newcommand{\bibliographyformat}{%
\titleformat{name=\chapter,numberless}[display]
{\normalfont\itshape\fontsize{12pt}{13pt}\selectfont}
{}
{0pt}%
{}%
}
\pretocmd\printbibliography{\bibliographyformat}{}{}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[backend=biber,style=philosophy-verbose,scauthors=all,%
lowscauthors=true,giveninits,classical=true,volnumformat=strings,%
volumeformat=romansc,sorting=nyt,commacit=true,citepages=omit,%
editionformat=superscript,indexing]%
{biblatex}
\usepackage{filecontents}
\addbibresource{\jobname.bib}
\nocite{*}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\tableofcontents
\chapter{Titolo}
\printbibliography
\end{document}
第一个命令运行正常，但第二个命令不正常。参考书目的标题继承了目录的样式。相反，如果我将相关代码放在\newcommand{\bibliographyformat}上面\printbibliography，则一切正常。我的错误是什么？谢谢！
附言
请也考虑我的代码：
\begin{filecontents*}{\jobname.bib}
@inbook{ boniolo:1999,
author = "Boniolo, Giovanni and Paolo Vidali",
title = "Scienza, filosofia e argomentazione",
booktitle = "Filosofia della scienza",
publisher = "B. Mondadori",
location = "Milano",
year = "1999",
pages = "627-708"
}
@book{ calabrese:2013,
author = "Calabrese, Stefano",
title = "Retorica e scienze neurocognitive",
publisher = "Carocci",
location = "Roma",
year = "2013",
}
@book{ meyer:1991,
author = "Meyer, Michel",
title = "Problematologia. Filosofia, scienza e linguaggio",
publisher = "Pratiche",
location = "Parma",
year = "1991",
}
\end{filecontents*}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\documentclass[a4paper,twoside,12pt]{report}
\usepackage{fontspec}
\setmainfont{EB Garamond}
\usepackage{polyglossia}
\setmainlanguage[babelshorthands=true]{italian}
\PolyglossiaSetup{italian}{indentfirst=false}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{titlesec,titletoc}
\usepackage{etoolbox}
\titleformat{\chapter}[display]
{\normalfont\fontsize{11pt}{12pt}\selectfont}{\thechapter}{0pt}{}
\newcommand{\tocformat}{%
\titleformat{name=\chapter,numberless}[display]
{\normalfont\bfseries\filleft\fontsize{11pt}{12pt}\selectfont}
{}
{0pt}%
{}%
}
\newcommand{\bibliographyformat}{%
\titleformat{name=\chapter,numberless}[display]
{\normalfont\itshape\fontsize{11pt}{12pt}\selectfont}
{}
{0pt}%
{}%
}
\pretocmd\tableofcontents{\tocformat}{}{}
\AfterEndPreamble{\pretocmd\printbibliography{\bibliographyformat}{}{}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[backend=biber,style=philosophy-verbose,scauthors=all,%
lowscauthors=true,giveninits,classical=true,volnumformat=strings,%
volumeformat=romansc,sorting=nyt,commacit=true,citepages=omit,%
editionformat=superscript,indexing]%
{biblatex}
\usepackage{filecontents}
\addbibresource{\jobname.bib}
\nocite{*}
\DeclareBibliographyCategory{books01}
\DeclareBibliographyCategory{books02}
\DeclareBibliographyCategory{books03}
\addtocategory{books01}{boniolo:1999}
\addtocategory{books02}{calabrese:2013}
\addtocategory{books03}{meyer:1991}
\defbibheading{books01}{\section*{Studi 1}}
\defbibheading{books02}{\section*{Studi 2}}
\defbibheading{books03}{\section*{Studi 3}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\tableofcontents
\chapter{Titolo}
\chapter*{\bibname}
\addcontentsline{toc}{chapter}{\bibname}
\markboth{\scshape bibliografia}{\scshape bibliografia}
\printbibliography[heading=books01,category=books01]
\printbibliography[heading=books02,category=books02]
\printbibliography[heading=books03,category=books03]
\end{document}
将会有一个更复杂的交互，因为如果我像在第二个 MWE 中那样设置参考书目，区分就会失败
PS2 游戏
在我的第一个代码中，
\AfterEndPreamble{\pretocmd\printbibliography{\bibliographyformat}{}{}}
即使我把那行放进去也可以前书目设置，因为它因为钩子而起作用\AfterEndPreamble。
在我的第二个代码中（情况稍微复杂一些），如果我没记错的话，参考书目的标题是由\chapter*{\bibname}and 生成的，因此 etoolbox 不会对其进行修补。事实上，它继承了目录的格式。所以这里的问题不在于我将 etoolbox 命令放在哪里。