O pioneers! /

Chicago citation style
Cather, Willa, 1873-1947. O pioneers! /. [1950]. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/000624040. (Accessed December 16, 2018.)
APA citation style
Cather, Willa, 1873-1947, ([1950]) O pioneers! /. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/000624040
MLA citation style
Cather, Willa, 1873-1947. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/000624040>.
Note: These citations are programmatically generated and may be incomplete.