@book{21467,
	author = {Walvoord, Barbara E. Fassler, and Anderson, Virginia Johnson,},
	title = {Effective grading :},
	publisher = {Jossey-Bass,},
	year = {c2010.},
	series = {The Jossey-Bass higher and adult education series},
	address = {San Francisco, CA :},
	edition = {2nd ed.}
}