APA引文

Esat R. ,Morison, A., Morrison, A., & Norton, J. (1990). Get sharp. Heinmann.

Chicago Style (17th ed.) Citation

Esat R. ,Morison, A., A. Morrison, and J. Norton. Get Sharp. Nairobi: Heinmann, 1990.

MLA引文

Esat R. ,Morison, A., et al. Get Sharp. Heinmann, 1990.