Valiente, A. (1979). Rubber: Production costs and returns and marketing, Northern and Southern Mindanao. Special Studies Division, Department of Agriculture.
Citace podle Chicago (17th ed.)Valiente, A.M. Rubber: Production Costs and Returns and Marketing, Northern and Southern Mindanao. Quezon City: Special Studies Division, Department of Agriculture, 1979.
Citace podle MLA (9th ed.)Valiente, A.M. Rubber: Production Costs and Returns and Marketing, Northern and Southern Mindanao. Special Studies Division, Department of Agriculture, 1979.
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