National Science Education Congress (1998 : Quezon City), Ogena, E. B., & Brawner, F. (1998). Science education in the Philippines: Challenges for development : proceedings and policy recommendations, volume 2. Science Education Institute, Department of Science and Technology.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Science Education Congress (1998 : Quezon City), Ester B. Ogena, و Filma Brawner. Science Education in the Philippines: Challenges for Development : Proceedings and Policy Recommendations, Volume 2. Taguig, Metro Manila: Science Education Institute, Department of Science and Technology, 1998.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Science Education Congress (1998 : Quezon City), et al. Science Education in the Philippines: Challenges for Development : Proceedings and Policy Recommendations, Volume 2. Science Education Institute, Department of Science and Technology, 1998.