Cita APA (7a ed.)

Graham, O., & Selin, C. W. (1963). Physical fitness for the businessman. National Foremen's Institute.

Cita Chicago Style (17a ed.)

Graham, Otto, y Carl Warren Selin. Physical Fitness for the Businessman. Waterford, Conn: National Foremen's Institute, 1963.

Cita MLA (9a ed.)

Graham, Otto, y Carl Warren Selin. Physical Fitness for the Businessman. National Foremen's Institute, 1963.