The content of Google Books comes from three sides:
In My Library you can
Every book contains a page "About this book" containing general bibiographic data such as title, author, year of publication, number of pages and subject. With the help of these data, it is easy to create references.
In the list of results you will see which version is shown. There are four options:
As in other Google sites there are clear differences between the .nl and.com version":