@book{2499,
	author = {Haslett Christopher and Edwin R. Chilvers, John A.A. Hunter, Nicholas A. Boon},
	title = {davidson's Principles and Practice of Medicine, },
	publisher = {Churchill Livingstone,},
	year = {1999.},
	address = {Philadelphia:,},
	edition = {18th ed.},
	url = {https://www.amazon.com/Davidsons-Principles-Practice-Medicine-Christopher/dp/0443059446}
}