Sta. Maria, C. B. (1979). Difficulties of teachers teaching elementary mathematics in the public elementary schools in the Division of Dagupan City for the school year 1961-1972: A critical analysis [microform]. Photoduplication Service, University of the Philippines Library.
Cita Chicago Style (17a ed.)Sta. Maria, Celerina B. Difficulties of Teachers Teaching Elementary Mathematics in the Public Elementary Schools in the Division of Dagupan City for the School Year 1961-1972: A Critical Analysis [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1979.
Cita MLA (9a ed.)Sta. Maria, Celerina B. Difficulties of Teachers Teaching Elementary Mathematics in the Public Elementary Schools in the Division of Dagupan City for the School Year 1961-1972: A Critical Analysis [microform]. Photoduplication Service, University of the Philippines Library, 1979.