Cita APA (7a ed.)

(1920). Personal efficiency: How to systematise yoursefl and your business . A.W. Shaw Company.

Cita Chicago Style (17a ed.)

Personal Efficiency: How to Systematise Yoursefl and Your Business . London: A.W. Shaw Company, 1920.

Cita MLA (9a ed.)

Personal Efficiency: How to Systematise Yoursefl and Your Business . A.W. Shaw Company, 1920.