APA (7th ed.) Citation

Cather, W. (1913). O pioneers! Houghton Mifflin.

Chicago Style (17th ed.) Citation

Cather, Willa. O Pioneers! Boston, New York: Houghton Mifflin, 1913.

MLA (9th ed.) Citation

Cather, Willa. O Pioneers! Houghton Mifflin, 1913.

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