@book{Beck,1979,
author = {Beck, A.},
title = {Cognitive therapy of depression},
year = {1979},
publisher = {Guilford press},
language = {English},
url = {books.google.com/books?id=L09cRS0xWj0C&lpg=PP15&ots=FWNhbK9qek&dq=%22Cognitive%20Therapy%20of%20Depression%22&lr&pg=PP15#v=onepage&q=%22Cognitive%20Therapy%20of%20Depression%22&f=false}
}