Ptak, C. A., & Schragenheim, E. (2000). ERP: Tools, techniques, and applications for integrating the supply chain. St. Lucie Press.

Ptak, Carol A., and Eli Schragenheim. ERP: Tools, Techniques, and Applications for Integrating the Supply Chain. Boca Raton: St. Lucie Press, 2000.

Ptak, Carol A., and Eli Schragenheim. ERP: Tools, Techniques, and Applications for Integrating the Supply Chain. St. Lucie Press, 2000.