Mutual aid : a factor of evolution

MLA

Kropotkin, Petr Alekseevič, and John Hewetson. Mutual Aid : a Factor of Evolution. London: Freedom press, 1993.

APA

Kropotkin, P. Alekseevič, & Hewetson, J. (1993). Mutual aid : a factor of evolution. London: Freedom press.

Chicago

Kropotkin, Petr Alekseevič, and John Hewetson. Mutual Aid: A Factor of Evolution. London: Freedom press, 1993.