Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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