@book{4972,
	author = {Vargas Berzunza, Jorge Mario and Guillén Mallette, Javier, },
	title = {Estudio de percepción y consumo de productos sustentables /},
	year = {2004},
	address = {Mérida, Yuc., },
	url = {https://www.cicy.mx/sitios/sib/doctoelectronico/5021.pdf}
}