Curriculum Development Center for Science and Mathematics, S. E. C. (1977). Elementary school mathematics 1: Learning math. Curriculum Development Center for Science and Mathematics, Science Education Center, University of the Philippines.
Chicago-viite (17. p.)Curriculum Development Center for Science and Mathematics, Science Education Center. Elementary School Mathematics 1: Learning Math. Quezon City: Curriculum Development Center for Science and Mathematics, Science Education Center, University of the Philippines, 1977.
MLA-viite (9. p.)Curriculum Development Center for Science and Mathematics, Science Education Center. Elementary School Mathematics 1: Learning Math. Curriculum Development Center for Science and Mathematics, Science Education Center, University of the Philippines, 1977.