Philippines. Department of Science and Technology-Science Education Institute, University of the Philippines Diliman. National Institute for Science and Mathematics Education Development UP NISMED, Arciaga, V., De Guzman, F., Ogena, E. B., & Talisayon, V. M. (2000). TIMSS-like test items in science and mathematics: Overall coordinators, Violeta Arciaga, Fe De Guzman ; National Research Coordinators (TIMSS-R), Ester B. Ogena, Vivien M. Talisayon. Department of Science and Technology, Science Education Institute and University of the Philippines National Institute for Science and Mathematics Education Development.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philippines. Department of Science and Technology-Science Education Institute, University of the Philippines Diliman. National Institute for Science and Mathematics Education Development UP NISMED, Violeta Arciaga, Fe De Guzman, Ester B. Ogena, و Vivien M. Talisayon. TIMSS-like Test Items in Science and Mathematics: Overall Coordinators, Violeta Arciaga, Fe De Guzman ; National Research Coordinators (TIMSS-R), Ester B. Ogena, Vivien M. Talisayon. Quezon City: Department of Science and Technology, Science Education Institute and University of the Philippines National Institute for Science and Mathematics Education Development, 2000.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Philippines. Department of Science and Technology-Science Education Institute, et al. TIMSS-like Test Items in Science and Mathematics: Overall Coordinators, Violeta Arciaga, Fe De Guzman ; National Research Coordinators (TIMSS-R), Ester B. Ogena, Vivien M. Talisayon. Department of Science and Technology, Science Education Institute and University of the Philippines National Institute for Science and Mathematics Education Development, 2000.