Niyomdham, S. (1975). A study on the inheritance of the absence of nicotine in the P2 generation of nicotineless tobacco prae variety [microform]. Photoduplication Service, University of the Philippines Library.
Cita Chicago (17th ed.)Niyomdham, Somchai. A Study on the Inheritance of the Absence of Nicotine in the P2 Generation of Nicotineless Tobacco Prae Variety [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1975.
Cita MLA (9th ed.)Niyomdham, Somchai. A Study on the Inheritance of the Absence of Nicotine in the P2 Generation of Nicotineless Tobacco Prae Variety [microform]. Photoduplication Service, University of the Philippines Library, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.