Arciaga, V., Guzman, F. d., Ogena, E. B., & Talisayon, V. M. (2002). TIMSS-like test items in elementary school mathematics and science. Department of Science and Technology-Science Education Institute and University of the Philippines National Institute for Science and Mathematics Education Development.

Arciaga, Violeta, Fe de Guzman, Ester B. Ogena, and Vivien M. Talisayon. TIMSS-like Test Items in Elementary School Mathematics and Science. Quezon City: Department of Science and Technology-Science Education Institute and University of the Philippines National Institute for Science and Mathematics Education Development, 2002.

Arciaga, Violeta, et al. TIMSS-like Test Items in Elementary School Mathematics and Science. Department of Science and Technology-Science Education Institute and University of the Philippines National Institute for Science and Mathematics Education Development, 2002.