By default, the report
document class uses \chapter
as the bibliography heading level. In contrast, the article
document class uses \section
as the bibliography heading level. If you're not using \chapter
anywhere in your document, you might want to use the article
class instead.
If you really want to use the report
class, you'll need to redefine the thebibliography
environment to use \section
instead of \chapter
. In the preamble of your document (after the \documentclass
line but before the \begin{document}
line, insert the following:
\makeatletter
\renewenvironment{thebibliography}[1]
{\section*{\bibname}% <-- this line was changed from \chapter* to \section*
\@mkboth{\MakeUppercase\bibname}{\MakeUppercase\bibname}%
\list{\@biblabel{\@arabic\c@enumiv}}%
{\settowidth\labelwidth{\@biblabel{#1}}%
\leftmargin\labelwidth
\advance\leftmargin\labelsep
\@openbib@code
\usecounter{enumiv}%
\let\p@enumiv\@empty
\renewcommand\theenumiv{\@arabic\c@enumiv}}%
\sloppy
\clubpenalty4000
\@clubpenalty \clubpenalty
\widowpenalty4000%
\sfcode`\.\@m}
{\def\@noitemerr
{\@latex@warning{Empty `thebibliography' environment}}%
\endlist}
\makeatother
Now your bibliography will have a \section
heading instead of a \chapter
heading.
Note that if you load any special bibliography packages, you might want to put this code before those packages are loaded (so you don't overwrite their work).