APA (7th ed.) Citation

Gilbreth, F. B., & Carey, E. G. (1948). Cheaper by the dozen. Bantam Books.

Chicago Style (17th ed.) Citation

Gilbreth, Frank B., and Ernestine Gilbreth Carey. Cheaper by the Dozen. New York: Bantam Books, 1948.

MLA (9th ed.) Citation

Gilbreth, Frank B., and Ernestine Gilbreth Carey. Cheaper by the Dozen. Bantam Books, 1948.