Hayen Roger. (2006). SAP R/3 Enterprise Software: An Introduction (Paperback) (photocopy). American: McGraw-Hill/Irwin.
Trích dẫn kiểu ChicagoHayen Roger. SAP R/3 Enterprise Software: An Introduction (Paperback) (photocopy). American: McGraw-Hill/Irwin, 2006.
Deismireacht MLAHayen Roger. SAP R/3 Enterprise Software: An Introduction (Paperback) (photocopy). American: McGraw-Hill/Irwin, 2006.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.