APA (7th ed.) Citation

Sanborn, M. (1990). Mark Twain: The bachelor years : a biography. Doubleday.

Chicago Style (17th ed.) Citation

Sanborn, Margaret. Mark Twain: The Bachelor Years : A Biography. New York: Doubleday, 1990.

MLA (9th ed.) Citation

Sanborn, Margaret. Mark Twain: The Bachelor Years : A Biography. Doubleday, 1990.