Cita APA (7th ed.)
Esat R. ,Morison, A., Morrison, A., & Norton, J. (1990). Get sharp. Heinmann.
Cita Chicago (17th ed.)
Esat R. ,Morison, A., A. Morrison, i J. Norton. Get Sharp. Nairobi: Heinmann, 1990.
Cita MLA (9th ed.)
Esat R. ,Morison, A., et al. Get Sharp. Heinmann, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.