APA (7th ed.) Citation

Aspiras, R. B. (1977). Some factors affecting ammonification in flooded soils [microform]. Photoduplication Service, University of the Philippines Library.

Chicago Style (17th ed.) Citation

Aspiras, Ruben Baldonado. Some Factors Affecting Ammonification in Flooded Soils [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1977.

MLA (9th ed.) Citation

Aspiras, Ruben Baldonado. Some Factors Affecting Ammonification in Flooded Soils [microform]. Photoduplication Service, University of the Philippines Library, 1977.