Check also out LaTeX tips

Page number
To refer to a given page:
\cite[p. 25]{myref}

Multiple citations
\cite{myref1,myref2,myref3}

Citations in author-year style
Use natbib: include the following line at the beginning of the file.
\usepackage[authoryear,round]{natbib}
Author (Year) is obtained with \cite{myref} while (Author, Year) is obtained with \citep{myref}
For the reference list, there are many possibilities. You might want to try out the following ones:

• \bibliographystyle{abbrvnat}
• \bibliographystyle{apalike}
• \bibliographystyle{plainnat}

The advantage with abbrvnat and plainnat is that they display the “url” field. They also write the surname of the authors first and the year at the end of the reference. plainnat writes out the full surname if available, which I find makes it harder to find references. In apalike the reference starts with Lastname, S. (Year).

Authorless citations
Typically, technical reports from research institutes. A workaround is to write an acronym of the institution in the “author” field and then write the full name in the “publisher” field.

“Cited in”
I’ve chosen to simply write “Cited in…” in the “note” field. That way, “Cited in…” appears at the end of the reference.