%%
%% The LaTeX Companion, 3ed
%%
%% Example 2-4-6 on page I-86 in "cleveref --- Cleverly formatted references".
%%
%% 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{159.0pt}
\setcounter{section}{3}
%StartShownPreambleCommands
 \usepackage{amsmath,cleveref}

%StopShownPreambleCommands

\begin{document}
 \section{A Section}\label{sec:this}

 A reference to an equation in this section looks
 like: ``see \cref{eq:a} in \cref{sec:this}''.
 \begin{align} a &= b \label{eq:a} \\
               b &< c \label{eq:b} \\
               c &< d \label{eq:c} \end{align}
 \Cref{eq:c,eq:a,eq:b} above are \ldots
\end{document}