National Science Education Congress (1998 : Quezon City), Ogena, E. B., & Brawner, F. (1998). Science education in the Philippines: Challenges for development. Science Education Institute, Department of Science and Technology.
Chicago-viite (17. p.)National Science Education Congress (1998 : Quezon City), Ester B. Ogena, ja Filma Brawner. Science Education in the Philippines: Challenges for Development. Taguig, Metro Manila: Science Education Institute, Department of Science and Technology, 1998.
MLA-viite (9. p.)National Science Education Congress (1998 : Quezon City), et al. Science Education in the Philippines: Challenges for Development. Science Education Institute, Department of Science and Technology, 1998.
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