Panga, I. B. (1975). A study of the achievement in arithmetic of the Grade IV classes in Iriga District, Division of Camarines Sur, school year 1963-64 [microform]. Photoduplication Service, University of the Philippines Library.
Chicagoスタイル(17版)引用形式Panga, Irene Borromeo. A Study of the Achievement in Arithmetic of the Grade IV Classes in Iriga District, Division of Camarines Sur, School Year 1963-64 [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1975.
MLA(9版)引用形式Panga, Irene Borromeo. A Study of the Achievement in Arithmetic of the Grade IV Classes in Iriga District, Division of Camarines Sur, School Year 1963-64 [microform]. Photoduplication Service, University of the Philippines Library, 1975.
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