De Leon, L. P. (1976). The effect of grouping on achievement, classroom participation and interaction of students in modern geometry at the Manuel L. Quezon (Public) High School, Manila [microform]. Photoduplication Service, University of the Philippines Library.
Παραπομπή σε μορφή Chicago (17η εκδ.)De Leon, Lorenzo Padua. The Effect of Grouping on Achievement, Classroom Participation and Interaction of Students in Modern Geometry at the Manuel L. Quezon (Public) High School, Manila [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1976.
Παραπομπή σε μορφή MLA (9th εκδ.)De Leon, Lorenzo Padua. The Effect of Grouping on Achievement, Classroom Participation and Interaction of Students in Modern Geometry at the Manuel L. Quezon (Public) High School, Manila [microform]. Photoduplication Service, University of the Philippines Library, 1976.