Cita APA (7th ed.)
Cather, W. (1993). O Pioneers! (First published in 1993.). Dover Publications.
Cita Chicago (17th ed.)
Cather, Willa. O Pioneers! First published in 1993. New York: Dover Publications, 1993.
Cita MLA (9th ed.)
Cather, Willa. O Pioneers! First published in 1993. Dover Publications, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.