Cruz, R. P. (1975). The difficulties in problem solving of Grade IV pupils in arithmetic in the Division of Pangasinan, 1961-62 [microform]. Photoduplication Service, University of the Philippines Library.
Chicago Style (17th ed.) CitationCruz, Rufo Perez. The Difficulties in Problem Solving of Grade IV Pupils in Arithmetic in the Division of Pangasinan, 1961-62 [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1975.
MLA citiranjeCruz, Rufo Perez. The Difficulties in Problem Solving of Grade IV Pupils in Arithmetic in the Division of Pangasinan, 1961-62 [microform]. Photoduplication Service, University of the Philippines Library, 1975.
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