Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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