\documentclass[12pt]{article}
\usepackage{geometry}                % See geometry.pdf to learn the layout options. There are lots.
\geometry{letterpaper}                   % ... or a4paper or a5paper or ... 
%\geometry{landscape}                % Activate for for rotated page geometry
\usepackage[parfill]{parskip}    % Activate to begin paragraphs with an empty line rather than an indent
\usepackage{graphicx}
\usepackage{amssymb}
\usepackage{epstopdf}
\DeclareGraphicsRule{.tif}{png}{.png}{`convert #1 `dirname #1`/`basename #1 .tif`.png}

\title{Engineering Ethics -- An Essay}
\author{Theodore G. Cleveland, Ph.D., P.E.\\}
\date{2 May 2007}                                           % Activate to display a given date or no date

\begin{document}
\maketitle
\include{introduction}
\include{philosophical}
\include{bribery}
\include{ethics_law}
\include{making_ethical_choices}
\include{code_of_ethics}
\include{documenting}
\include{bibliography}
\end{document}   