Johnson, P. F., Flynn, A. E., & Leenders, M. R. (2011). Purchasing and supply management (14th ed.). McGraw-Hill.
Chicago-čujuhus (17. p.)Johnson, P. Fraser, Anna E. Flynn, juo Michiel R. Leenders. Purchasing and Supply Management. 14th ed. Boston: McGraw-Hill, 2011.
MLA-čujuhus (9. p.)Johnson, P. Fraser, et al. Purchasing and Supply Management. 14th ed. McGraw-Hill, 2011.
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