↑Bigley, John et Permenter, Paris, Insiders' Guide to San Antonio, 3rd (Insiders' Guide Series), Guilford, Conn, Globe Pequot, , 305 p. (ISBN0-7627-4047-7, lire en ligne).
↑Laura L. Koppes, Historical Perspectives in Industrial and Organizational Psychology (Applied Psychology Series) (Applied Psychology Series), Hillsdale, N.J, Lawrence Erlbaum Associates, , 178 p. (ISBN0-8058-4440-6, lire en ligne).