@book{168636,
	author = {Torres Gaytán, Ricardo.},
	title = {Teoría del comercio internacional},
	publisher = {Siglo Ventiuno Editores},
	year = {1977},
	series = {Economía y demografía},
	address = {México, D.F.},
	edition = {6. ed.},
	note = {Includes index.}
}