Zorilla, R. S. (1979). A diagnostic study of the difficulties in modern mathematics of first year students of Jose Abad Santos High School, Arellano University [microform]. Photoduplication Service, University of the Philippines Library.
Chicago Style (17th ed.) CitationZorilla, Roland S. A Diagnostic Study of the Difficulties in Modern Mathematics of First Year Students of Jose Abad Santos High School, Arellano University [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1979.
MLA (9th ed.) CitationZorilla, Roland S. A Diagnostic Study of the Difficulties in Modern Mathematics of First Year Students of Jose Abad Santos High School, Arellano University [microform]. Photoduplication Service, University of the Philippines Library, 1979.