First time poster, and a newbie to LaTeX .
I'm working in LaTeX to write an essay. When I typset in the following way (Latex/bibtex/latex/latex), I get a wonderful set of references in my bibliographies but in the body of my document I get (?) instead of the citation.
Please help. Where am I going wrong? I've spent 2 hours on this and it's beginning to make me go a little crazy!

Here's what my main LaTeX article looks like:
Code: Select all
\documentclass[12pt, a4paper]{article}
% See the ``Article customise'' template for come common customisations
\title{PH400: In what sense do the laws of physics lie?}
\author{Blue Mohito}
\date{Word count: 1987} % delete this line to display the current date
\linespread{2.0}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage[hmargin=2.54cm,vmargin=2.54cm]{geometry}
\usepackage{harvard}
% Latin Modern (similar to CM with more characters)
\usepackage{lmodern} % math, rm, ss, tt
\usepackage[T1]{fontenc}
%%% BEGIN DOCUMENT
\begin{document}
\maketitle
This essay will discuss in what sense can the laws of physics ``lie'', in respect to the arguments put forward in Nancy Cartwright's, How the Laws of Physics lie \cite{Cartwright}
\bibliographystyle{plain}
\bibliography{mybib}
\end{document}
Code: Select all
%% This BibTeX bibliography file was created using BibDesk.
%% http://bibdesk.sourceforge.net/
%% Created for X at 2013-02-03 14:01:44 +0000
%% Saved with string encoding Unicode (UTF-8)
@book{Cartwright,
Author = {Cartwright, Nancy},
Title = {How the Laws of Physics Lie},
Edition = {First},
Publisher = {OUP Oxford},
Year = {1983}}