Valiente, A. (1979). Rubber: Production costs and returns and marketing, Northern and Southern Mindanao. Special Studies Division, Department of Agriculture.
Citazione stile Chigago Style (17a edizione)Valiente, A.M. Rubber: Production Costs and Returns and Marketing, Northern and Southern Mindanao. Quezon City: Special Studies Division, Department of Agriculture, 1979.
Citatione MLA (9a ed.)Valiente, A.M. Rubber: Production Costs and Returns and Marketing, Northern and Southern Mindanao. Special Studies Division, Department of Agriculture, 1979.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.