@book{183738,
	author = {Acosta Romero, Miguel},
	title = {Las mutaciones de los estados en la última década del siglo XX},
	publisher = {Editorial Porrúa},
	year = {1993.},
	address = {México},
	edition = {1. ed.},
	note = {Includes texts of the constitutions of Brazil, Canada, Colombia, China, Spain, the United States, France, Italy, Mexico, and the Soviet Union.}
}