@book{18645,
	author = {Festinger, Leon and Katz, Daniel},
	title = {Los métodos de investigación en las ciencias sociales},
	publisher = {Editorial Paidós},
	year = {1972.},
	series = {Biblioteca de psicología social y sociología, v. 25. Serie mayor},
	address = {Buenos Aires},
	note = {Translation of : Research methods in the behavioral sciences.}
}