APA (7th ed.) Citation

Milne, L. J., Milne, M. J. G., & Shortt, T. M. (1981). The world of night. Harper & Row.

Chicago Style (17th ed.) Citation

Milne, Lorus Johnson, Margery Joan Greene Milne, and T. M. Shortt. The World of Night. New York: Harper & Row, 1981.

MLA (9th ed.) Citation

Milne, Lorus Johnson, et al. The World of Night. Harper & Row, 1981.