De Leon, L. P. (1977). The effect of grouping on achievement, classroom participation and interaction of students in modern geometry at the Manuel L. Quezon (Public) High School, Manila. University of the Philippines Library.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিDe 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. Quezon City: University of the Philippines Library, 1977.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিDe 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. University of the Philippines Library, 1977.
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