APA (7th ed.) Citation

Bainbridge, H. C. (1937). Twice seven (Rev. ed.). Dutton.

Chicago Style (17th ed.) Citation

Bainbridge, Henry Charles. Twice Seven. Rev. ed. New York: Dutton, 1937.

MLA (9th ed.) Citation

Bainbridge, Henry Charles. Twice Seven. Rev. ed. Dutton, 1937.