@book{18541,
	author = {Cunningham, F. Gary. and Leveno, Kenneth J},
	title = {Williams Obstetricia. /},
	publisher = {McGraw Hill Interamericana,},
	year = {2015.},
	address = {México:},
	edition = {Veinticuatroava  edición},
	note = {Incluye índice.}
}