Mutual aid : a factor of evolution

MLA

Kropotkin, Petr Alekseevič, and Paul Avrich. Mutual Aid : a Factor of Evolution. New York: New York university press, 1975.

APA

Kropotkin, P. Alekseevič, & Avrich, P. (1975). Mutual aid : a factor of evolution. New York: New York university press.

Chicago

Kropotkin, Petr Alekseevič, and Paul Avrich. Mutual Aid: A Factor of Evolution. New York: New York university press, 1975.