Aray, L. V. (1976). Common problems of grade six pupils in the public school of Cotabato City District I for school year 1971-1972 [microform]. Photoduplication Service University of the Philippines Library.
Citace podle Chicago (17th ed.)Aray, Luciana V. Common Problems of Grade Six Pupils in the Public School of Cotabato City District I for School Year 1971-1972 [microform]. Quezon City: Photoduplication Service University of the Philippines Library, 1976.
Citace podle MLA (9th ed.)Aray, Luciana V. Common Problems of Grade Six Pupils in the Public School of Cotabato City District I for School Year 1971-1972 [microform]. Photoduplication Service University of the Philippines Library, 1976.
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