@book{92331,
	author = {Villegas Rodríguez, Humberto.},
	title = {Determinación de pigmentos en diferentes cultivares de nochebuena (Euphorbia pulcherrima Willd. ex Klotzch)},
	publisher = {El autor,},
	year = {2006.},
	address = {Chapingo, Méx. :}
}