Cita APA (7a ed.)

Gregory, J. S., & Horrabin, J. (1946). Land of the Soviets: By James S. Gregory. Penguin Books.

Cita Chicago Style (17a ed.)

Gregory, James S., y J.F Horrabin. Land of the Soviets: By James S. Gregory. Harmondsworth;New York: Penguin Books, 1946.

Cita MLA (8a ed.)

Gregory, James S., y J.F Horrabin. Land of the Soviets: By James S. Gregory. Penguin Books, 1946.