Gaya APA

Hayen,Roger. (2009). SAP R/3 enterprise software : An introduction international edition (International edition). Singapore: McGraw-Hill.

Gaya Chicago

Hayen,Roger. SAP R/3 enterprise software : An introduction international edition. International edition Singapore: McGraw-Hill, 2009. Text.

Gaya MLA

Hayen,Roger. SAP R/3 enterprise software : An introduction international edition. International edition Singapore: McGraw-Hill, 2009. Text.

Gaya Turabian

Hayen,Roger. SAP R/3 enterprise software : An introduction international edition. International edition Singapore: McGraw-Hill, 2009. Print.