APA ציטוט

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

Chicago Style (17th ed.) Citation

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

ציטוט MLA

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