APA (7th ed.) Citation

Koestler, A., & Simon, E. (1965). The gladiators. Hutchinson.

Chicago Style (17th ed.) Citation

Koestler, Arthur, and Edith Simon. The Gladiators. Hutchinson, 1965.

MLA (9th ed.) Citation

Koestler, Arthur, and Edith Simon. The Gladiators. Hutchinson, 1965.

Warning: These citations may not always be 100% accurate.