Campos, B. (1976). Socio-economic study of farmers in Kalinga-Apayao. Special Studies Division, Dept. of Agriculture.
Citazione stile Chigago Style (17a edizione)Campos, B.T. Socio-economic Study of Farmers in Kalinga-Apayao. Quezon City: Special Studies Division, Dept. of Agriculture, 1976.
Citatione MLA (9a ed.)Campos, B.T. Socio-economic Study of Farmers in Kalinga-Apayao. Special Studies Division, Dept. of Agriculture, 1976.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.