Cita APA (7a ed.)

Marden, O. S. (1913). Training for efficiency. Thomas Y. Crowell company.

Cita Chicago Style (17a ed.)

Marden, Orison Swett. Training for Efficiency. New York: Thomas Y. Crowell company, 1913.

Cita MLA (8a ed.)

Marden, Orison Swett. Training for Efficiency. Thomas Y. Crowell company, 1913.