@book{272033,
	author = {Marzano, Robert J. and Frontier, Tony. and ProQuest (Firm)},
	title = {Effective supervision},
	publisher = {ASCD,},
	year = {c2011.},
	address = {Alexandria, Va. :},
	url = {https://ebookcentral.proquest.com/lib/kuct-ebooks/detail.action?docID=698903}
}