@book{149037,
	author = {Bertcher, Harvey J. and University of Michigan.},
	title = {Group participation techniques for leaders and members},
	publisher = {Published in cooperation with the Continuing Education Program in the Human Services of the University of Michigan School of Social Work [by] Sage Publications},
	year = {1993.},
	series = {Sage human services guides},
	address = {Thousand Oaks, Calif.},
	edition = {2nd ed.}
}