APA (7th ed.) Citation

Masters, E. L. (1966). Mark Twain: A portrait. Biblo and Tannen.

Chicago Style (17th ed.) Citation

Masters, Edgar Lee. Mark Twain: A Portrait. New York: Biblo and Tannen, 1966.

MLA (9th ed.) Citation

Masters, Edgar Lee. Mark Twain: A Portrait. Biblo and Tannen, 1966.