@book{50081,
	author = {Porter, Brenda and Hatherly, David J.},
	title = {Principles of external auditing /},
	publisher = {Wiley,},
	year = {c2008},
	address = {Chichester, England ;},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0827/2008013168-t.html}
}