APA (7th ed.) Citation

Kropotkine , P., Piroshnikoff , J. R., & Friedland , L. S. (1968). Ethics: Origin and development. Benjamin Blom.

Chicago Style (17th ed.) Citation

Kropotkine , Pierre, Joseph R. Piroshnikoff , and Louis S. Friedland. Ethics: Origin and Development. Benjamin Blom, 1968.

MLA (8th ed.) Citation

Kropotkine , Pierre, et al. Ethics: Origin and Development. Benjamin Blom, 1968.