Παραπομπή APA
Heller, R. (2002). Manager's handbook: Everything you need to knoe about how business and management work. London: Dorling Kindersley.
Παραπομπή Chicago StyleHeller, Robert. Manager's Handbook: Everything You Need to Knoe About How Business and Management Work. London: Dorling Kindersley, 2002.
Παραπομπή MLAHeller, Robert. Manager's Handbook: Everything You Need to Knoe About How Business and Management Work. London: Dorling Kindersley, 2002.
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