Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.