Citazione Stile APA (7a Edizione)

Twain, M., Howells, W. D., & Clark, C. H. (1969). Mark Twain's library of humor. Garrett Press.

Citazione stile Chigago Style (17a edizione)

Twain, Mark, William Dean Howells, e Charles Hopkins Clark. Mark Twain's Library of Humor. New York: Garrett Press, 1969.

Citatione MLA (8a ed.)

Twain, Mark, et al. Mark Twain's Library of Humor. Garrett Press, 1969.