@book{5007,
	author = {Cunningham, F. Gary and Leveno, Kenneth},
	title = {Williams obstetricia},
	publisher = {McGraw-Hill Interamericana Editores,},
	year = {2019},
	address = {Ciudad de México:},
	edition = {25a ed.},
	note = {Título original : Williams obstetrics.}
}