Southeast Asian Conference on Mathematics Education Manila, Philippines, The Philippine Council of Mathematics Teacher Educators (MATHED), Southeast Asian Mathetical Society (SEAMS), Ogena, E. B., & Golla, E. F. (1999). Mathematics for the 21st century: 8th Southeast Asian Conference on Mathematics Education technical papers held at Ateneo de Manila University, Manila, 30 May-4June, 1999. Southeast Asian Mathematical Society, Philippine Council of Mathematics Teachers Educators.

Southeast Asian Conference on Mathematics Education Manila, Philippines, The Philippine Council of Mathematics Teacher Educators (MATHED), Southeast Asian Mathetical Society (SEAMS), Ester B. Ogena, and Evangeline F. Golla. Mathematics for the 21st Century: 8th Southeast Asian Conference on Mathematics Education Technical Papers Held at Ateneo De Manila University, Manila, 30 May-4June, 1999. Manila: Southeast Asian Mathematical Society, Philippine Council of Mathematics Teachers Educators, 1999.

Southeast Asian Conference on Mathematics Education Manila, Philippines, et al. Mathematics for the 21st Century: 8th Southeast Asian Conference on Mathematics Education Technical Papers Held at Ateneo De Manila University, Manila, 30 May-4June, 1999. Southeast Asian Mathematical Society, Philippine Council of Mathematics Teachers Educators, 1999.