APA (7th ed.) Citation

Steel, R. W., Steel, E. M., & Monkhouse, F. J. (1981). Africa (2. ed.). Longman.

Chicago Style (17th ed.) Citation

Steel, Robert W., Eileen M. Steel, and Francis John Monkhouse. Africa. 2. ed. London [u.a.]: Longman, 1981.

MLA (9th ed.) Citation

Steel, Robert W., et al. Africa. 2. ed. Longman, 1981.