Guzman, R. (1974). Sweet potato marketing; Part II: Eastern Visayas. Special Studies Division, National Food and Agriculture Council, Dept. of Agriculture.
Chicago-viite (17. p.)Guzman, R.D. Sweet Potato Marketing; Part II: Eastern Visayas. Quezon City: Special Studies Division, National Food and Agriculture Council, Dept. of Agriculture, 1974.
MLA-viite (9. p.)Guzman, R.D. Sweet Potato Marketing; Part II: Eastern Visayas. Special Studies Division, National Food and Agriculture Council, Dept. of Agriculture, 1974.
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