@book{253621,
	author = {Browning, Peter C. and Sparks, William L.},
	title = {The director's manual : },
	publisher = {Wiley, },
	year = {2015.},
	address = {New Jersey : },
	url = {http://catalogimages.wiley.com/images/db/jimages/9781119133360.jpg}
}