Style de citation APA (7e éd.)

Boyd, W. L. (2019). A Life on the Middle West's Never-Ending Frontier. University of Iowa Press.

Style de citation Chicago (17e éd.)

Boyd, Willard L. A Life on the Middle West's Never-Ending Frontier. Iowa City: University of Iowa Press, 2019.

Style de citation MLA (8e éd.)

Boyd, Willard L. A Life on the Middle West's Never-Ending Frontier. University of Iowa Press, 2019.