Heller, F. A. e. (1959). New developments in training: Five studies in the efficient communication of skills. Polytechnic Management Association.
Chicago-referens (17:e uppl.)Heller, Frank A. ed. New Developments in Training: Five Studies in the Efficient Communication of Skills. [London]: Polytechnic Management Association, 1959.
MLA-referens (9:e uppl.)Heller, Frank A. ed. New Developments in Training: Five Studies in the Efficient Communication of Skills. Polytechnic Management Association, 1959.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.