Ethics, origin and development,

MLA

Kropotkin, Petr Alekseevič, Louis S Friedland, and Joseph R Piroshnikoff. Ethics, Origin and Development. New York,: Tudor Publishing, 1947.

APA

Kropotkin, P. Alekseevič, Friedland, L. S., & Piroshnikoff, J. R. (1947). Ethics, origin and development. New York,: Tudor Publishing.

Chicago

Kropotkin, Petr Alekseevič, Ethics, Origin and Development,. Translated by Louis S. Friedland and Joseph R Piroshnikoff. New York,: Tudor Publishing, 1947.