APA (7th ed.) Citation

Cather, W. (1992). O pioneers! (1st Vintage classics ed.). Vintage Books.

Chicago Style (17th ed.) Citation

Cather, Willa. O Pioneers! 1st Vintage classics ed. New York: Vintage Books, 1992.

MLA (8th ed.) Citation

Cather, Willa. O Pioneers! 1st Vintage classics ed. Vintage Books, 1992.

Warning: These citations may not always be 100% accurate.