Leenders, M. R., Jonson, F. P., Flynn, A. E., & Fearon, H. E. (2010). Purchasing and supply management: : with 50 supply chain cases. McGraw-Hill.

Leenders, Michiel R., Fraser P. Jonson, Anna E. Flynn, a Harold E. Fearon. Purchasing and Supply Management: : With 50 Supply Chain Cases. New Delhi: McGraw-Hill, 2010.

Leenders, Michiel R., et al. Purchasing and Supply Management: : With 50 Supply Chain Cases. McGraw-Hill, 2010.