Cita APA (7th ed.)
Gibson, W. M. (1967). William D. Howells. University of Minnesota Press.
Cita Chicago (17th ed.)
Gibson, William M. William D. Howells. Minneapolis, MN: University of Minnesota Press, 1967.
Cita MLA (9th ed.)
Gibson, William M. William D. Howells. University of Minnesota Press, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.