Gaya APA

Jacobs, F, R., Whybark, D, C. (2000). Why erp? : a primer on SAP implementation . Boston: Irwin/McGraw-Hill.

Gaya MLA

Jacobs, F., Robert., Whybark, D., Clay. "Why erp? : a primer on SAP implementation". Boston: Irwin/McGraw-Hill, 2000. Text.