Cita APA

Rolvaag, O. E. 1., & Rolvaag, O. E. 1. (1929). Giants in the earth. New York, New York: Harper.

Citación estilo Chicago

Rolvaag, Ole Edvart 1876-1931, y Ole Edvart 1876-1931 Rolvaag. Giants in the Earth. New York, New York: Harper, 1929.

Cita MLA

Rolvaag, Ole Edvart 1876-1931, y Ole Edvart 1876-1931 Rolvaag. Giants in the Earth. New York, New York: Harper, 1929.