Cortado, R. V. (1977). Survey, identification and pathogenicity tests of nematodes associated with tobacco grown in northern Luzon [microform]. Photoduplication Service. University of the Philippines Library.
Cita Chicago (17th ed.)Cortado, Rosendo Valdez. Survey, Identification and Pathogenicity Tests of Nematodes Associated with Tobacco Grown in Northern Luzon [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Cita MLA (9th ed.)Cortado, Rosendo Valdez. Survey, Identification and Pathogenicity Tests of Nematodes Associated with Tobacco Grown in Northern Luzon [microform]. Photoduplication Service. University of the Philippines Library, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.