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.