(2000). Environmental Management system (EMS) EMS Audit and ISO 14000 Certification: Green Productivity Program. Carl Duisberg gesellschaft.
استشهاد بنمط شيكاغوEnvironmental Management System (EMS) EMS Audit and ISO 14000 Certification: Green Productivity Program. Carl Duisberg gesellschaft, 2000.
MLA استشهادEnvironmental Management System (EMS) EMS Audit and ISO 14000 Certification: Green Productivity Program. Carl Duisberg gesellschaft, 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.