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