Paper  bibtex   

@article{tatum_unsustainable_????,
	title = {Unsustainable {California}},
	url = {http://test.cacs.org/pdf/52.pdf},
	urldate = {2015-06-04TZ},
	author = {Tatum, Adam and Carter, Autumn and Ravi, Madhu and Kaldani, Davina}
}