APA (7th ed.) Citation

Kropotkin, P. A. Mutual Aid: A Factor of Evolution.

Chicago Style (17th ed.) Citation

Kropotkin, Petr Alekseevich. Mutual Aid: A Factor of Evolution.

MLA (9th ed.) Citation

Kropotkin, Petr Alekseevich. Mutual Aid: A Factor of Evolution.

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