GOPALAKRISHNAN, P. (1992). Purchasing And Materials Management P. Gopalakrishnan. McGraw-Hill.
Čikaški stil citiranja (17. izdanje)GOPALAKRISHNAN, P. Purchasing And Materials Management P. Gopalakrishnan. McGraw-Hill, 1992.
MLA način citiranja (8. izdanje)GOPALAKRISHNAN, P. Purchasing And Materials Management P. Gopalakrishnan. McGraw-Hill, 1992.
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