@book{33980,
	author = {Cunningham, F. Gary. and ProQuest (Firm)},
	title = {Williams obstetrics},
	publisher = {McGraw-Hill, Medical Pub. Division,},
	year = {c2010.},
	address = {New York :},
	edition = {23rd ed. /},
	url = {https://ebookcentral.proquest.com/lib/vajira-ebooks/detail.action?docID=4657822}
}