@book{776,
	author = {Certo, Samuel C.},
	title = {Supervision :},
	publisher = {McGraw-Hill/Irwin, a business unit of The McGraw-Hill Companies, Inc.,},
	year = {c2008.},
	address = {Boston :},
	edition = {6th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip073/2006035826.html}
}