Leader, D., & Corfield, D. (2008). Why do people get ill?: Darian Leader and David Corfield (3rd edition.). Penguin Books.
Chicago-Zitierstil (17. Ausg.)Leader, Darian, und David Corfield. Why Do People Get Ill?: Darian Leader and David Corfield. 3rd edition. London: Penguin Books, 2008.
MLA-Zitierstil (8. Ausg.)Leader, Darian, und David Corfield. Why Do People Get Ill?: Darian Leader and David Corfield. 3rd edition. Penguin Books, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.