@book{70877,
	author = {Pagano, Robert R. and Palmas Velasco, Oscar Alfredo},
	title = {Estadística para las ciencias del  comportamiento},
	publisher = {: International  Thomson},
	year = {1999},
	address = {Mexico},
	edition = {5a. ed.},
	note = {de: Understanding statistics in the behavioral sciences, 5th edition}
}