@book{9478,
	author = {Williamson, Ronald D. and Blackbum, Barbara R.},
	title = {The Principalship from A to Z /},
	publisher = {Routledge,},
	year = {2016.},
	series = {An Eye on Education book},
	address = {New York :},
	edition = {Second edition},
	note = {Includes bibliographic references}
}