Παραπομπή σε μορφή APA (7η εκδ.)

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.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Cruz, 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.

Παραπομπή σε μορφή MLA (9th εκδ.)

Cruz, 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.