APA (7th ed.) Citation

Doukan, G., Case, A., & Case, R. M. (1957). The world beneath the waves. Allen & Unwin.

Chicago Style (17th ed.) Citation

Doukan, Gilbert, A. Case, and R. M. Case. The World Beneath the Waves. London: Allen & Unwin, 1957.

MLA (8th ed.) Citation

Doukan, Gilbert, et al. The World Beneath the Waves. Allen & Unwin, 1957.