\documentclass[titlepage]{article}

\usepackage{indentfirst}

\ifx\nullocplist\undefined
\input hlguide-k.tex
\else
\input hlguide-u.tex
\fi

\newpage

\bibliographystyle{halpha}
\ifx\nullocplist\undefined
\bibliography{hlguide-k,texbook1,texbook3}
\else
\bibliography{hlguide-u,texbook1,texbook3}
\fi
\printindex

%% Start Of Trailer
\end{document}