Graham, O., & Selin, C. W. (1963). Physical fitness for the businessman. National Foremen's Institute.
Citazione stile Chigago Style (17a edizione)Graham, Otto, e Carl Warren Selin. Physical Fitness for the Businessman. Waterford, Conn: National Foremen's Institute, 1963.
Citatione MLA (9a ed.)Graham, Otto, e Carl Warren Selin. Physical Fitness for the Businessman. National Foremen's Institute, 1963.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.