Manguiat, I. J. (1977). Microbiological transformations of nitrogen in flooded maahas clay [microform]. Photoduplication Service. University of the Philippines Library.
Cita Chicago (17th ed.)Manguiat, Ireneo Javier. Microbiological Transformations of Nitrogen in Flooded Maahas Clay [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Cita MLA (9th ed.)Manguiat, Ireneo Javier. Microbiological Transformations of Nitrogen in Flooded Maahas Clay [microform]. Photoduplication Service. University of the Philippines Library, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.