Mangubat, E. (1981). A Comparison of pupil achievement in elementary mathematics using individualized instruction utilizing self-directed instructional materials and the teacher-directed mastery-based method. Western Mindanao State University.
Cita Chicago (17th ed.)Mangubat, Emmanuel. A Comparison of Pupil Achievement in Elementary Mathematics Using Individualized Instruction Utilizing Self-directed Instructional Materials and the Teacher-directed Mastery-based Method. Zamboanga City: Western Mindanao State University, 1981.
Cita MLA (9th ed.)Mangubat, Emmanuel. A Comparison of Pupil Achievement in Elementary Mathematics Using Individualized Instruction Utilizing Self-directed Instructional Materials and the Teacher-directed Mastery-based Method. Western Mindanao State University, 1981.