@book{7313,
	author = {Davidson, Stanley.},
	title = {Davidson's Principles and Practice of Medicine},
	publisher = {ELBS ,},
	year = {1991 .},
	address = {Hong Kong :},
	edition = {16th ed.},
	url = {https://books.google.com.pk/books?id=9UdOPgAACAAJ&dq=0443044821&hl=en&sa=X&redir_esc=y}
}