APA (7th ed.) Zitazioa

Gibson, W. M. (1967). William D. Howells. University of Minnesota Press.

Chicago Style (17th ed.) Zitazioa

Gibson, William M. William D. Howells. Minneapolis, MN: University of Minnesota Press, 1967.

MLA (9th ed.) Zitazioa

Gibson, William M. William D. Howells. University of Minnesota Press, 1967.