@book{205356,
	author = {Cohen, Wayne R. and Friedman, Emanuel A.,},
	title = {Labor and delivery care : a practical guide /},
	publisher = {Wiley-Blackwell,},
	year = {2011.},
	address = {Chichester, West Sussex ;},
	url = {http://onlinelibrary.wiley.com/book/10.1002/9781119971566}
}