Castillo, L. L. (1980). The effects of extension and technical knowledge on farmer productivity in Nueva Ecija, Philippines [microform]. Photoduplication Service. University of the Philippines Library.
Citace podle Chicago (17th ed.)Castillo, Linda Lao. The Effects of Extension and Technical Knowledge on Farmer Productivity in Nueva Ecija, Philippines [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1980.
Citace podle MLA (9th ed.)Castillo, Linda Lao. The Effects of Extension and Technical Knowledge on Farmer Productivity in Nueva Ecija, Philippines [microform]. Photoduplication Service. University of the Philippines Library, 1980.
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