APA (7th ed.) Citation

Merrick, W., O' Sullivan, J., & Stratton, F. (1993). Planet Earth. Oxford University Press.

Chicago Style (17th ed.) Citation

Merrick, William, Joan O' Sullivan, and Frances Stratton. Planet Earth. Oxford: Oxford University Press, 1993.

MLA (9th ed.) Citation

Merrick, William, et al. Planet Earth. Oxford University Press, 1993.