APA citiranje

Clerk, G. C., Ewer, D. W., & Hall, J. B. (1972). Ecological biology: For A-level and intermediate students in Africa. Longman.

Chicago Style (17th ed.) Citation

Clerk, G. C., D. W. Ewer, and J. B. Hall. Ecological Biology: For A-level and Intermediate Students in Africa. London: Longman, 1972.

MLA citiranje

Clerk, G. C., et al. Ecological Biology: For A-level and Intermediate Students in Africa. Longman, 1972.