APA (7th ed.) Citation

Bainbridge, H. C. (1937). Twice seven / by H.C. Bainbridge (2nd ed.). Dutton.

Chicago Style (17th ed.) Citation

Bainbridge, H. C. Twice Seven / by H.C. Bainbridge. 2nd ed. Dutton, 1937.

MLA (9th ed.) Citation

Bainbridge, H. C. Twice Seven / by H.C. Bainbridge. 2nd ed. Dutton, 1937.

Warning: These citations may not always be 100% accurate.