APA (7th ed.) Citation

Emerson, H. (1913). The twelve principles of efficiency. Engineering Magazine Co..

Chicago Style (17th ed.) Citation

Emerson, Harrington. The Twelve Principles of Efficiency. N.Y.: Engineering Magazine Co., 1913.

MLA (8th ed.) Citation

Emerson, Harrington. The Twelve Principles of Efficiency. Engineering Magazine Co., 1913.

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