Fabreo, R. H. (1975). Instructional problems in elementary agriculture in Nueva Vizcaya [microform]. Photoduplication Service, University of the Philippines Library.
Chicago-viite (17. p.)Fabreo, Rodrigo H. Instructional Problems in Elementary Agriculture in Nueva Vizcaya [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1975.
MLA-viite (9. p.)Fabreo, Rodrigo H. Instructional Problems in Elementary Agriculture in Nueva Vizcaya [microform]. Photoduplication Service, University of the Philippines Library, 1975.
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