biblatex-apa关于这种风格，我无法习惯的一件事是 3-5 位作者的引用：如果作者数量在 3-5 位之间，则所有作者都会打印在引用中。
例如 Biblatex-apa 风格：
- [引文] Goossens、Mittelbach、Samarin 和 Peter (2020)
- [参考书目] Goossens, M., Mittelbach, F., Samarin, A. 和 Peter, T. (2020)。如何在家自制核弹（第 1 版）。马萨诸塞州雷丁：Addison-Wesley。
有时作者列表在文本中很长，我认为这确实没有必要。那么如何将数字设置maxcitenames为2，就像内置的 biblatex 样式一样。
提供 MWE：
\documentclass{article}
\usepackage[colorlinks]{hyperref}
\usepackage{libertine}
\usepackage[UKenglish]{babel}
\usepackage{csquotes}
\usepackage[
style=apa,
backend=biber,
maxcitenames=2, % no effect!
natbib=true] {biblatex}
\DeclareLanguageMapping{british}{british-apa}
\LetLtxMacro{\cite}{\citet} %
\addbibresource{biblatex-examples.bib}
\begin{document}
\section*{Apa citation}
Article - 2 authors: \cite{sarfraz}\\
Article - 3 authors: \cite{companion}\\
In proceeding: \cite{salam}\\
Ph.D thesis: \cite[see e.g.][]{geer} \\
Master thesis: \cite{loh}\\
Report: \cite{padhye}\\
Repeat citation: \cite{companion}, \citet{companion}, \citep{companion} \\
Multi-citation: \cite{bertram,knuth:ct:a,knuth:ct:b,knuth:ct:c} \\
\printbibliography
\end{document}
答案1
是的，maxcitenames显然对没有影响biblatex-apa。我遇到过这个问题，其中biblatex-apa非常接近我所需的样式，但我并不需要 3-5 位作者的所有作者姓名，我也不希望实现首次引用如 APA 格式所述。
解决方案是修改导致这种情况的代码，您可以在文件中找到它apa.cbx，它通常位于...../tex/latex/biblatex-apa。
对应的一段代码如下：
\DeclareNameFormat{labelname}{%
\ifthenelse{\value{uniquelist}>1}
{\numdef\cbx@min{\value{uniquelist}}}
{\numdef\cbx@min{\value{minnames}}}%
\ifboolexpr{test {\ifnumcomp{\value{listcount}}{=}{1}}
or test {\ifnumcomp{\value{listtotal}}{=}{2}}}
{\usebibmacro{labelname:doname}{#1}{#2}{#3}{#4}{#5}{#6}{#7}{#8}}
{\ifboolexpr{test {\ifnumcomp{\value{listtotal}}{>}{5}}
or test {\ifciteseen}}
{\ifnumcomp{\value{listcount}}{<}{\cbx@min + 1}% normal name
{\usebibmacro{labelname:doname}{#1}{#2}{#3}{#4}{#5}{#6}{#7}{#8}}%
{}%
\ifnumcomp{\value{listcount}}{=}{\cbx@min + 1}% first past ul is et al
% but enforce plurality of et al - only truncate here if there is at
% least one more element after the current potential truncation point
% so that "et al" covers at least two elements.
{\ifnumcomp{\value{listcount}}{<}{\value{listtotal}}
{\andothersdelim\bibstring{andothers}}
{\usebibmacro{labelname:doname}{#1}{#2}{#3}{#4}{#5}{#6}{#7}{#8}}}%
{}%
\ifnumcomp{\value{listcount}}{>}{\cbx@min + 1}% nothing thereafter
{\relax}%
{}}%
{\usebibmacro{labelname:doname}{#1}{#2}{#3}{#4}{#5}{#6}{#7}{#8}}}}
此代码执行的操作之一是检查作者数量是否大于 5，或者条目是否已被引用，如果是，则et al在第一位作者之后分配。通过修改代码，将 改为5并2删除or test {\ifciteseen}（注意右括号），那么任何超过 2 位作者的引用都将具有，et al无论是否已被使用。以下是编辑后的部分，除了 和 之外，\makeatletter将\makeatother其放入文档序言时需要这些
\makeatletter
\DeclareNameFormat{labelname}{%
\ifthenelse{\value{uniquelist}>1}
{\numdef\cbx@min{\value{uniquelist}}}
{\numdef\cbx@min{\value{minnames}}}%
\ifboolexpr{test {\ifnumcomp{\value{listcount}}{=}{1}}
or test {\ifnumcomp{\value{listtotal}}{=}{2}}}
{\usebibmacro{labelname:doname}{#1}{#2}{#3}{#4}{#5}{#6}{#7}{#8}}
{\ifboolexpr{test {\ifnumcomp{\value{listtotal}}{>}{\value{maxnames}}}}% <- EDIT
{\ifnumcomp{\value{listcount}}{<}{\cbx@min + 1}% normal name
{\usebibmacro{labelname:doname}{#1}{#2}{#3}{#4}{#5}{#6}{#7}{#8}}%
{}%
\ifnumcomp{\value{listcount}}{=}{\cbx@min + 1}% first past ul is et al
% but enforce plurality of et al - only truncate here if there is at
% least one more element after the current potential truncation point
% so that "et al" covers at least two elements.
{\ifnumcomp{\value{listcount}}{<}{\value{listtotal}}
{\andothersdelim\bibstring{andothers}}
{\usebibmacro{labelname:doname}{#1}{#2}{#3}{#4}{#5}{#6}{#7}{#8}}}%
{}%
\ifnumcomp{\value{listcount}}{>}{\cbx@min + 1}% nothing thereafter
{\relax}%
{}}%
{\usebibmacro{labelname:doname}{#1}{#2}{#3}{#4}{#5}{#6}{#7}{#8}}}}
\makeatother
该xpatch包提供了一种将相同的更改应用于labelname格式指令的简单方法。
\usepackage[style=apa,backend=biber,natbib=true,
maxcitenames=2,uniquelist=false]{biblatex}
\DeclareLanguageMapping{british}{british-apa}
\usepackage{xpatch}
\xpatchnameformat{labelname}
{\ifciteseen}{\ifnumcomp{\value{listtotal}}{>}{\value{maxnames}}}{}{}