我正在使用 LaTeX tufte-book 类，需要弄清楚如何将以下 MWE 中 TSEliot 书目条目标题的每个单词的首字母大写：
\documentclass{tufte-book}
\hypersetup{colorlinks}
\title{A Tufte-Style Book\thanks{Thanks to Edward R.~Tufte for his inspiration.}}
\author[The Tufte-LaTeX Developers]{The Tufte-LaTeX\ Developers}
\publisher{Publisher of This Book}
\usepackage{ebgaramond}
\usepackage{xcolor}
\usepackage{amssymb,amsmath}
\usepackage{todonotes}
\usepackage{tikz}
\usepackage{pgfplots}
\usepackage{listings}
\usepackage{spreadtab}
\usepackage[toc,page]{appendix}
\usepackage{epspdfconversion}
\usepackage[toc]{glossaries}
\usepackage{multirow}
\usepackage[utf8]{inputenc}
\usepackage{ucs}
\usepackage{microtype}
\usepackage{booktabs}
\usepackage{graphicx}
\setkeys{Gin}{width=\linewidth,totalheight=\textheight,keepaspectratio}
\graphicspath{{graphics/}}
\usepackage{fancyvrb}
\fvset{fontsize=\normalsize}
\usepackage{units}
\providecommand{\XeLaTeX}{X\lower.5ex\hbox{\kern-0.15em\reflectbox{E}}\kern-0.1em\LaTeX}
\usepackage{makeidx}
\usepackage[T5,T1]{fontenc}
\usepackage[english]{babel}
\usepackage{mathdesign}
\newcommand{\openepigraph}[2]{%
\begin{fullwidth}
\sffamily\small
\begin{doublespace}
\noindent\allcaps{#1}\\% epigraph
\noindent\allcaps{#2}% author
\end{doublespace}
\end{fullwidth}
}%
\begin{document}
\openepigraph{%
If you came this way,\\\noindent
Taking any route, starting from anywhere,\\\noindent
At any time or at any season,\\\noindent
It would always be the same: you would have to put off\\\noindent
Sense and notion. You are not here to verify,\\\noindent
Instruct yourself, or inform curiosity\\\noindent
Or carry report. You are here to kneel\\\noindent
Where prayer has been valid. And prayer is more\\\noindent
Than an order of words, the conscious occupation\\\noindent
Of the praying mind, or the sound of the voice praying.\\\noindent
And what the dead had no speech for, when living,\\\noindent
They can tell you, being dead: the communication\\\noindent
Of the dead is tongued with fire beyond the language of the living.\\\noindent
Here, the intersection of the timeless moment\\\noindent
Is England and nowhere. Never and always.
}{—T.S. Eliot (lines 41-55)\cite{TSEliot}
}%
\vfill
\openepigraph{%
The Sky is blue.
}
{—Author\cite{Tufte2001}}
\bibliography{sample-handout}
\bibliographystyle{plainnat}
\end{document}
以下是 .bib 文件的内容：
@MISC{TSEliot,
author = {Eliot, T. S.},
title = {Four Quartets No. 4: Little Gidding},
month = {December 2013 [Accessed 27 January 2022]},
howpublished = {\url{http://www.davidgorman.com/4quartets/4-gidding.htm}}
}
@BOOK{Tufte2001,
author = {Edward R. Tufte},
title = {The Visual Display of Quantitative Information},
publisher = {Graphics Press},
year = {2001},
address = {Cheshire, Connecticut},
isbn = {0-9613921-4-2}
}