@book{37194,
	author = {Spets, Sammy. and ebrary, Inc.},
	title = {Programming Drupal 7 entities},
	publisher = {Packt Pub.,},
	year = {2013.},
	series = {Open source : community experience distilled},
	address = {Birmingham :},
	note = {Includes index.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10728419}
}