Cita APA (7th ed.)

Guthrie. (1947). The Big Sky (1st.). Time-Life Books Inc..

Cita Chicago (17th ed.)

Guthrie. The Big Sky. 1st. Alexandria, Va: Time-Life Books Inc., 1947.

Cita MLA (9th ed.)

Guthrie. The Big Sky. 1st. Time-Life Books Inc., 1947.