Campos, B. (1976). Socio-economic study of farmers in Kalinga-Apayao. Special Studies Division, Dept. of Agriculture.
Citace podle Chicago (17th ed.)Campos, B.T. Socio-economic Study of Farmers in Kalinga-Apayao. Quezon City: Special Studies Division, Dept. of Agriculture, 1976.
Citace podle MLA (9th ed.)Campos, B.T. Socio-economic Study of Farmers in Kalinga-Apayao. Special Studies Division, Dept. of Agriculture, 1976.
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