@book{66942,
	author = {Jacobson, Paul Benjamin},
	title = {The effective school principal},
	publisher = {Prentice-Hall},
	year = {1963.},
	address = {Englewood Cliffs, N.J.},
	edition = {2. ed.},
	note = {First published in 1941 under title : Duties of school principals.}
}