Cita APA

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

Citación estilo Chicago

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

Cita MLA

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

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