APA (7th ed.) Citation

Valera, A. (1980). Field studies on water use and duration for land preparation for lowland rice [microform]. Photoduplication Service. University of the Philippines Library.

Chicago Style (17th ed.) Citation

Valera, Alfredo. Field Studies on Water Use and Duration for Land Preparation for Lowland Rice [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1980.

MLA (9th ed.) Citation

Valera, Alfredo. Field Studies on Water Use and Duration for Land Preparation for Lowland Rice [microform]. Photoduplication Service. University of the Philippines Library, 1980.