Kohls, R. L. (1967). Marketing of Agricultural products (3rd ed.). Collier- Macmillan.
Chicago-čujuhus (17. p.)Kohls, Richard L. Marketing of Agricultural Products. 3rd ed. London: Collier- Macmillan, 1967.
MLA-čujuhus (9. p.)Kohls, Richard L. Marketing of Agricultural Products. 3rd ed. Collier- Macmillan, 1967.
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