@book{2103,
	author = {Kanski, Jack J.  and Bowling, Brad},
	title = {Clinical ophthalmology : },
	publisher = {Elsevier/Saunders},
	year = {2011.},
	address = {Edinburgh :},
	edition = {7th ed.},
	url = {https://books.google.com.pk/books?id=MQXjTT5HIMUC&printsec=frontcover&dq=Clinical+ophthalmology+:+a+systematic+approach&hl=en&sa=X&redir_esc=y#v=onepage&q=Clinical%20ophthalmology%20%3A%20a%20systematic%20approach&f=false}
}