APA (7th ed.) Citation

Kropotkin, P. A., & Huxley, T. H. (1972). Mutual aid; a factor of evolution. Garland Pub.

Chicago Style (17th ed.) Citation

Kropotkin, Petr Alekseevich, and Thomas Henry Huxley. Mutual Aid; a Factor of Evolution. New York: Garland Pub, 1972.

MLA (9th ed.) Citation

Kropotkin, Petr Alekseevich, and Thomas Henry Huxley. Mutual Aid; a Factor of Evolution. Garland Pub, 1972.