%%
%% The LaTeX Companion, 3ed
%%
%% Example 16-3-25 on page II-498 in "Publications without author or year information".
%%
%% 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}

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

%StartShownPreambleCommands
\usepackage{natbib} \bibliographystyle{unsrtnat}
%StopShownPreambleCommands

\begin{document}
\citet{G-G} / \citet{oddity} / \citet{GNUMake} \\
\citep{G-G} / \citep{oddity} / \citep{GNUMake}
\end{document}