APA (7th ed.) Citation

Kropotkin, P. (1902). Mutual aid, a factor of evolution.

Chicago Style (17th ed.) Citation

Kropotkin, P. Mutual Aid, a Factor of Evolution. 1902.

MLA (8th ed.) Citation

Kropotkin, P. Mutual Aid, a Factor of Evolution. 1902.

Warning: These citations may not always be 100% accurate.