APA (7e ed.) Bronvermelding

Campos, B. (1976). Socio-economic study of farmers in Kalinga-Apayao. Special Studies Division, Dept. of Agriculture.

Chicago (17e ed.) Bronvermelding

Campos, B.T. Socio-economic Study of Farmers in Kalinga-Apayao. Quezon City: Special Studies Division, Dept. of Agriculture, 1976.

MLA (9e ed.) Bronvermelding

Campos, B.T. Socio-economic Study of Farmers in Kalinga-Apayao. Special Studies Division, Dept. of Agriculture, 1976.