APA (7e ed.) Bronvermelding

Abaya, A. P., & Asuncion, T. B. (1985). Cost and returns of sweet potato in selected provinces: Philippines, 1983. Bureau of Agricultural Economics.

Chicago (17e ed.) Bronvermelding

Abaya, Aurelia P., en Tirso B. Asuncion. Cost and Returns of Sweet Potato in Selected Provinces: Philippines, 1983. Quezon City: Bureau of Agricultural Economics, 1985.

MLA (9e ed.) Bronvermelding

Abaya, Aurelia P., en Tirso B. Asuncion. Cost and Returns of Sweet Potato in Selected Provinces: Philippines, 1983. Bureau of Agricultural Economics, 1985.