You can find the stable book link under the image of the cover. Just click on "Share Link to Book":
A box with the link will pop up. Copy that link:
You need to attach the pre-proxy URL (https://vanguard.idm.oclc.org/login?url= ) to access the book from off campus. It should look like this:
https://vanguard.idm.oclc.org/login?url=http://site.ebrary.com/lib/vusc/detail.action?docID=10951966