Ptak, C. A., & Schragenheim, E. (2000). ERP: Tools, techniques, and applications for integrating the supply chain. St. Lucie Press.
Lua i Stíl Chicago (17ú heag.)Ptak, Carol A., agus Eli Schragenheim. ERP: Tools, Techniques, and Applications for Integrating the Supply Chain. Boca Raton: St. Lucie Press, 2000.
Lua MLA (8ú heag.)Ptak, Carol A., agus Eli Schragenheim. ERP: Tools, Techniques, and Applications for Integrating the Supply Chain. St. Lucie Press, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.