APA (7th ed.) Citation

Hewetson , J., Darwin , C., & Kropotkine , P. (1946). Mutual Aid and social evolution. Freedom Press.

Chicago Style (17th ed.) Citation

Hewetson , John, Charles Darwin , and Pierre Kropotkine. Mutual Aid and Social Evolution. Freedom Press, 1946.

MLA (8th ed.) Citation

Hewetson , John, et al. Mutual Aid and Social Evolution. Freedom Press, 1946.