In reference to the discussion about citations, we're recently added a 'Wikipedia citation' link to Open Library. For example:
http://openlibrary.org/books/OL17963918M/An_inland_voyage
At the bottom of the page on the right is this:
Download catalog record: RDF / JSON | Wikipedia citation
The Wikipedia citation link will give you a citation template to copy and paste to Wikipedia. We would welcome any comments about this citation template.
We would like to have a list on the page, "what cites this book" for citations in Wikipedia and elsewhere on the web.