Helms, M. M. (2006). Student study and lecture guide for use with Operations management for competitive advantage (11. ed.). McGraw-Hill/Irwin.
Chicago-Zitierstil (17. Ausg.)Helms, Marilyn M. Student Study and Lecture Guide for Use with Operations Management for Competitive Advantage. 11. ed. Boston [u.a.]: McGraw-Hill/Irwin, 2006.
MLA-Zitierstil (9. Ausg.)Helms, Marilyn M. Student Study and Lecture Guide for Use with Operations Management for Competitive Advantage. 11. ed. McGraw-Hill/Irwin, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.