@book{184609,
	author = {Walvoord, Barbara E. Fassler and Anderson, Virginia Johnson},
	title = {Effective grading},
	publisher = {Jossey-Bass Publishers},
	year = {c1998.},
	series = {The Jossey-Bass higher and adult education series},
	address = {San Francisco, Calif.},
	edition = {1st ed.},
	url = {http://www.loc.gov/catdir/toc/onix06/97041753.html}
}