@book{5261,
	author = {Bertalanffy, Ludwing von},
	url = {http://doctorado.jairomolina.com.ve/wp-content/uploads/2015/06/46580777-Ludwig-Von-Bertalanffy-Teoria-General-de-Los-Sistemas.pdf},
	title = {Teoría general de los sistemas: Fundamentos, desarrollo; aplicaciones},
	address = {México,},
	publisher = {Fondo de Cultura Económica:},
	year = {c1976.}
}