Não informado. (1969). Industrial Engineering. Institute of Industrial Engineers.
Chicago-Zitierstil (17. Ausg.)Não informado. Industrial Engineering. Norcross, Ga: Institute of Industrial Engineers, 1969.
MLA-Zitierstil (8. Ausg.)Não informado. Industrial Engineering. Institute of Industrial Engineers, 1969.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.