Singer, E. J. (1977). Training in industry and commerce (Rev. ed.). Institute of Personnel Management.
Cita Chicago (17th ed.)Singer, Edwin James. Training in Industry and Commerce. Rev. ed. London: Institute of Personnel Management, 1977.
Cita MLA (9th ed.)Singer, Edwin James. Training in Industry and Commerce. Rev. ed. Institute of Personnel Management, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.