\documentclass[12pt]{book} 
\usepackage{times,graphicx,url} 
\renewcommand{\bibname}{Works Cited} 
\begin{document} 
\section*{Response Paper 20030801}

This is a short document meant to serve as an example of how \LaTeX\
can be used to create bibliographies. We don't have the MLA citation
package installed as of \today, but we should soon. Right now, these
citations are in the basic plain format. If you need more 
style files
installed - say for instance, you need Chicago style citations - email
help@image.ufl.edu to request that we add that package. We may or may
not be able to do it, but we can try.
  
This is just a small sample of how LaTeX and BIBTeX work. 

\subsection*{Comparative Analysis with Previous Texts} 
\cite{strunk-and-white}

This is just a small sample of how LaTeX and BIBTeX work. 
\cite{latex}

This is just a small sample of how LaTeX and BIBTeX work. 
\cite{prime-number-theorem}                        

This is just a small sample of how LaTeX and BIBTeX work. 
This is just a small sample of how LaTeX and BIBTeX work. 
\cite{chicago}

This is just a small sample of how LaTeX and BIBTeX work. 
This is just a small sample of how LaTeX and BIBTeX work. 
This is just a small sample of how LaTeX and BIBTeX work. 

This is just a small sample of how LaTeX and BIBTeX work. 
\bibliography{bibtex_testfour}
\bibliographystyle{plain}

\end{document}