Twain, M., & De Voto, B. A. (1968). The portable Mark Twain. Viking Press.
Chicago Style (17th ed.) CitationTwain, Mark, and Bernard Augustine De Voto. The Portable Mark Twain. New York: Viking Press, 1968.
MLA (9th ed.) CitationTwain, Mark, and Bernard Augustine De Voto. The Portable Mark Twain. Viking Press, 1968.