@book{2906,
	author = {Clayton, Stanley G.(editor)},
	title = {Obstetrics :by ten teachers },
	publisher = {Arnold,},
	year = {2000.},
	address = {London :},
	edition = {14th ed. },
	url = {https://books.google.com.pk/books?id=6tCfBwAAQBAJ&printsec=frontcover&dq=obstetrics+ten+teacher&hl=en&sa=X&ved=2ahUKEwiHw7qIg9L0AhUCLewKHXyVD6EQ6AF6BAgEEAI#v=onepage&q&f=false}
}