\documentclass[12pt]{article}
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\usepackage[authoryear]{natbib}
\makeatletter
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\makeatother
\begin{document}

\title{Citation Test with Package \texttt{natbib}}
\author{Herbert Vo\ss}
\maketitle

\begin{verbatim}
\usepackage[authoryear]{natbib}
\end{verbatim}

\begin{enumerate}
\item
\verb|\citet[see][page 99ff]{goossens:companion}|\\
Type 1 (citet), Demo: Some nonsense text to show linebreak.\citet[see][page 99ff]{goossens:companion}
\item
\verb|\citet[see][page 99ff]{goossens:companion,hagen:metafun}|\\
Type 1, Demo: Some nonsense text to show linebreak.\citet[see][page 99ff]{goossens:companion,hagen:metafun}
\item
\verb|\citep[see][page 99ff]{goossens:companion}|\\
Type 2 (citep), Demo: Some nonsense text to show linebreak.\citep[see][page 99ff]{goossens:companion}
\item
\verb|\citep[see][page 99ff]{goossens:companion,hagen:metafun}|\\
Type 2, Demo: Some nonsense text to show linebreak.\citep[see][page 99ff]{goossens:companion,hagen:metafun}
\item
\verb|\citealt[see][page 99ff]{goossens:companion}|\\
Type 3 (citealt), Demo: Some nonsense text to show linebreak.\citealt[see][page 99ff]{goossens:companion}
\item
\verb|\citealt[see][page 99ff]{goossens:companion,hagen:metafun}|\\
Type 3, Demo: Some nonsense text to show linebreak.\citealt[see][page 99ff]{goossens:companion,hagen:metafun}
\item
\verb|\citealp[see][page 99ff]{hagen:metafun}|\\
Type 4 (citealp), Demo: Some nonsense text to show linebreak.\citealp[see][page 99ff]{hagen:metafun}
\item
\verb|\citealp[see][page 99ff]{goossens:companion,hagen:metafun}|\\
Type 4, Demo: Some nonsense text to show linebreak.\citealp[see][page 99ff]{goossens:companion,hagen:metafun}
\item
\verb|\citeauthor[see][page 99ff]{hagen:metafun}|\\
Type 5 (citeauthor), Demo: Some nonsense text to show linebreak.\citeauthor[see][page 99ff]{hagen:metafun}
\item
\verb|\citeauthor[see][page 99ff]{goossens:companion,hagen:metafun}|\\
Type 5, Demo: Some nonsense text to show linebreak.\citeauthor[see][page 99ff]{goossens:companion,hagen:metafun}
\item
\verb|\citeyear[see][page 99ff]{hagen:metafun}|\\
Type 6 (citeyear), Demo: Some nonsense text to show linebreak.\citeyear[see][page 99ff]{hagen:metafun}
\item
\verb|\citeyear[see][page 99ff]{goossens:companion,hagen:metafun}|\\
Type 6, Demo: Some nonsense text to show linebreak.\citeyear[see][page 99ff]{goossens:companion,hagen:metafun}
\item
\verb|\citeyearpar[see][page 99ff]{hagen:metafun}|\\
Type 7 (citeyearpar), Demo: Some nonsense text to show linebreak.\citeyearpar[see][page 99ff]{hagen:metafun}
\item
\verb|\citeyearpar[see][page 99ff]{goossens:companion,hagen:metafun}|\\
Type 7, Demo: Some nonsense text to show linebreak.\citeyearpar[see][page 99ff]{goossens:companion,hagen:metafun}
\end{enumerate}

\begin{verbatim}
\nocite{*}
\bibliographystyle{apalike}
\bibliography{natbib}
\end{verbatim}
\nocite{*}
\bibliographystyle{apalike}
\bibliography{natbib}

\end{document}