APA (7e ed.) Bronvermelding

Venegas, E. C. (1977). Interactions between labor intensity, cultural practices and yields in rice production [microform]. Photoduplication Service. University of the Philippines Library.

Chicago (17e ed.) Bronvermelding

Venegas, Ernesto C. Interactions Between Labor Intensity, Cultural Practices and Yields in Rice Production [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.

MLA (9e ed.) Bronvermelding

Venegas, Ernesto C. Interactions Between Labor Intensity, Cultural Practices and Yields in Rice Production [microform]. Photoduplication Service. University of the Philippines Library, 1977.