APA-referens (7:e uppl.)

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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