APA

Gilbreth F. B., Carey E. G., . (1948). Cheaper by the dozen. New York: Crowell.

Chicago

Gilbreth Frank B, Carey Ernestine Gilbreth, . 1948. Cheaper by the dozen. New York: Crowell.

Harvard

Gilbreth F. B., Carey E. G., . (1948). Cheaper by the dozen. New York: Crowell.

MLA

Gilbreth Frank B, Carey Ernestine Gilbreth, . Cheaper by the dozen. New York: Crowell. 1948.