Walker, A. G. (1995). International trade procedures and management (4th edition.). Oxford; Boston: Butterworth-Heinemann.
Čikaški stil citiranjaWalker, A. G. International Trade Procedures and Management. 4th edition. Oxford; Boston: Butterworth-Heinemann, 1995.
MLA način citiranjaWalker, A. G. International Trade Procedures and Management. 4th edition. Oxford; Boston: Butterworth-Heinemann, 1995.
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