Cita APA (7a ed.)

Osofsky, S. (1979). Peter Kropotkin. Twayne.

Cita Chicago Style (17a ed.)

Osofsky, Stephen. Peter Kropotkin. Boston: Twayne, 1979.

Cita MLA (9a ed.)

Osofsky, Stephen. Peter Kropotkin. Twayne, 1979.