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Lua i Stíl Chicago (17ú heag.)Kappauf, Jens, Lauterbach,Bernd, agus Matthias Koch. Logistic Core Operations with SAP: Procurement, Production and Distribution Logistics. Berlin, Heidelberg: Springer, 2011.
Lua MLA (9ú heag.)Kappauf, Jens, et al. Logistic Core Operations with SAP: Procurement, Production and Distribution Logistics. Springer, 2011.
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