Leader, D., & Corfield, D. (2008). Why do people get ill?: Darian Leader and David Corfield (3rd edition.). Penguin Books.
Chicago Style (17. basım) AtıfLeader, Darian, ve David Corfield. Why Do People Get Ill?: Darian Leader and David Corfield. 3rd edition. London: Penguin Books, 2008.
MLA (8th ed.) AtıfLeader, Darian, ve David Corfield. Why Do People Get Ill?: Darian Leader and David Corfield. 3rd edition. Penguin Books, 2008.
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