Perez, C. T. (1983). Capital investment and income of coffee farms in Cagayan Valley. Information Section, Bureau of Agricultural Economics.
Citazione stile Chigago Style (17a edizione)Perez, Cynthia T. Capital Investment and Income of Coffee Farms in Cagayan Valley. Quezon City: Information Section, Bureau of Agricultural Economics, 1983.
Citatione MLA (9a ed.)Perez, Cynthia T. Capital Investment and Income of Coffee Farms in Cagayan Valley. Information Section, Bureau of Agricultural Economics, 1983.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.