WikiBib is a useful link when creating citations -- link broken, perhaps the page moved somewhere???
The references used in my contributions are listed here (for copy and paste)
bibliography
Google books
I find Google books quite useful tool and use it relatively often for searching informations. Thus I'm not particularly happy that Google templates have been deleted Wikipedia:Templates for deletion/Log/2006_February_1#Google_templates. This means the information bellow is not valid anymore - I've left it here only to explain why you find in bibliography several items which use non-existing templates -- I hope to correct this later.
I use {{googleprint}} and {{googleprintpage}} templates for citing books from print.google. Another possibility is [1].