Capital in Bibtex

There are three good answers to this question.

• Use the unsrt bibliography style, if you're happy with its formatting otherwise
• Use the makebst (link) tool to design your own bibliography style

And my personal recommendation:

• Use the biblatex package (link). It's the most complete and flexible bibliography tool in the LaTeX world.

Using biblatex, you'd write something like

\documentclass[12pt]{article}
\usepackage[sorting=none]{biblatex}
\bibliography{journals,phd-references} % Where journals.bib and phd-references.bib are BibTeX databases
\begin{document}
\cite{robertson2007}
\cite{earnshaw1842}
\printbibliography
\end{document}

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).