University of the Philippines, Diliman. National Institute for Science and Mathematics Education Development (UP NISMED). (2001). Science Curriculum for the 21st century. National Institute for Science and Mathematics Education development.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of the Philippines, Diliman. National Institute for Science and Mathematics Education Development (UP NISMED). Science Curriculum for the 21st Century. Diliman, Quezon City: National Institute for Science and Mathematics Education development, 2001.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)University of the Philippines, Diliman. National Institute for Science and Mathematics Education Development (UP NISMED). Science Curriculum for the 21st Century. National Institute for Science and Mathematics Education development, 2001.