APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

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