Cita APA (7th ed.)

Ritchie, A. (1945). Civilization, science and religion. Penguin Books.

Cita Chicago (17th ed.)

Ritchie, A.D. Civilization, Science and Religion. Harmondsworth: Penguin Books, 1945.

Cita MLA (8th ed.)

Ritchie, A.D. Civilization, Science and Religion. Penguin Books, 1945.