APA (7th ed.) Citation

Emerson, H. (1913). The twelve principles of efficiency (5th ed.). The Engineering magazine.

Chicago Style (17th ed.) Citation

Emerson, Harrington. The Twelve Principles of Efficiency. 5th ed. New York: The Engineering magazine, 1913.

MLA (9th ed.) Citation

Emerson, Harrington. The Twelve Principles of Efficiency. 5th ed. The Engineering magazine, 1913.