%%
%% The LaTeX Companion, 3ed
%%
%% Example 16-4-2 on page II-503 in "natbib --- Revisited".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{183.0pt}

\setlength\parindent{0pt}
%% Do not show the bibliography itself in the example,
%% so put it on a separate page:
\AtEndDocument{\newpage\bibliographystyle{plainnat}
                       \bibliography{tlc}}

%StartShownPreambleCommands
\usepackage[numbers]{natbib}
%StopShownPreambleCommands

\begin{document}
\citet*{LGC97}               \\
\citeauthor{LGC97}           \\
\citeauthor*{LGC97}          \\
\citeyear{LGC97}  or  \citeyearpar{LGC97}
\end{document}