Bulatao, V. G. (1976). A study of the improvement of instruction in "new" social studies through in-service education in Lumban District [microform]. Photoduplication Service. University of the Philippines Library.
Chicago-referens (17:e uppl.)Bulatao, Virginia Gaza. A Study of the Improvement of Instruction in "New" Social Studies Through In-service Education in Lumban District [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1976.
MLA-referens (9:e uppl.)Bulatao, Virginia Gaza. A Study of the Improvement of Instruction in "New" Social Studies Through In-service Education in Lumban District [microform]. Photoduplication Service. University of the Philippines Library, 1976.
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