APA (7e ed.) Bronvermelding
O'Brien, D. (2004). Gk with Derek the ultimate general knowledge and quiz compendium: Sports and cinema. Penguin Books.
Chicago (17e ed.) Bronvermelding
O'Brien, Derek. Gk with Derek the Ultimate General Knowledge and Quiz Compendium: Sports and Cinema. New Delhi: Penguin Books, 2004.
MLA (9e ed.) Bronvermelding
O'Brien, Derek. Gk with Derek the Ultimate General Knowledge and Quiz Compendium: Sports and Cinema. Penguin Books, 2004.
Let op: Deze citaties zijn niet altijd 100% accuraat.