Cita APA (7th ed.)

London, J. (1917). The iron heel (1a. ed.). Grosset & Dunlap.

Cita Chicago (17th ed.)

London, Jack. The Iron Heel. 1a. ed. Nueva York: Grosset & Dunlap, 1917.

Cita MLA (9th ed.)

London, Jack. The Iron Heel. 1a. ed. Grosset & Dunlap, 1917.