Hayen Roger. (2006). SAP R/3 Enterprise Software(photocopy). American: McGraw -Hill.
Čikaški stil citiranjaHayen Roger. SAP R/3 Enterprise Software(photocopy). American: McGraw -Hill, 2006.
MLA način citiranjaHayen Roger. SAP R/3 Enterprise Software(photocopy). American: McGraw -Hill, 2006.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.