Cita APA (7th ed.)
O'Brien, D. (2004). Gk with derek the ultimate general knowledge and quiz com ndium: 2 business. PenguinBooks.
Cita Chicago (17th ed.)
O'Brien, Derek. Gk with Derek the Ultimate General Knowledge and Quiz Com Ndium: 2 Business. New Delh: PenguinBooks, 2004.
Cita MLA (9th ed.)
O'Brien, Derek. Gk with Derek the Ultimate General Knowledge and Quiz Com Ndium: 2 Business. PenguinBooks, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.