APA (7th ed.) Citation

Kropotkine , P., HEWETSON John, & WALTER Nicolas. (1987). Mutual aid: A factor of evolution. Freedom Press.

Chicago Style (17th ed.) Citation

Kropotkine , Pierre, HEWETSON John, and WALTER Nicolas. Mutual Aid: A Factor of Evolution. Freedom Press, 1987.

MLA (8th ed.) Citation

Kropotkine , Pierre, et al. Mutual Aid: A Factor of Evolution. Freedom Press, 1987.