Liao, S. (1977). Factors affecting productivity and adoption of improved farm practices in rice farms [microform]. Photoduplication Service. University of the Philippines Library.
Chicago-referens (17:e uppl.)Liao, Sheng-Hui. Factors Affecting Productivity and Adoption of Improved Farm Practices in Rice Farms [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
MLA-referens (9:e uppl.)Liao, Sheng-Hui. Factors Affecting Productivity and Adoption of Improved Farm Practices in Rice Farms [microform]. Photoduplication Service. University of the Philippines Library, 1977.
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