Still not Sure?
The rule is, remember the basic principles of why we do references, and don't get bogged down in too much detail. Answer the seven questions, or as many of them as you can, and you won't go far wrong.
If you want to find out about something which we haven't looked at here, there are some useful websites which include material on referencing.
Two good ones are: http://www.bournemouth.ac.uk/library/using/harvard_system.html
http://owl.english.purdue.edu/handouts/research/index.html (A big site, with Referencing included)