Abilay, W. P. (1981). Biological constraints to high yields on some rice farms in Nueva Ecija, Philippines [microform]. Photoduplication Service. University of the Philippines Library.
Citação do estilo Chicago (17ª ed.)Abilay, Wenceslao P. Biological Constraints to High Yields on Some Rice Farms in Nueva Ecija, Philippines [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1981.
Citação MLA (9ª ed.)Abilay, Wenceslao P. Biological Constraints to High Yields on Some Rice Farms in Nueva Ecija, Philippines [microform]. Photoduplication Service. University of the Philippines Library, 1981.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.