APA (7th ed.) Citation

Koestler, A., & Atholl, K. M. S. (1937). Spanish testament. Gollancz.

Chicago Style (17th ed.) Citation

Koestler, Arthur, and Katharine Marjory Stewart-Murray Atholl. Spanish Testament. London: Gollancz, 1937.

MLA (9th ed.) Citation

Koestler, Arthur, and Katharine Marjory Stewart-Murray Atholl. Spanish Testament. Gollancz, 1937.

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