Curriculum Development Center for Science, Science Education Center, University of the Philippines. (1977). Elementary school science 1: Things around us. Department of Education and Culture, Republic of the Philippines.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Curriculum Development Center for Science, Science Education Center, University of the Philippines. Elementary School Science 1: Things Around Us. Manila: Department of Education and Culture, Republic of the Philippines, 1977.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)Curriculum Development Center for Science, Science Education Center, University of the Philippines. Elementary School Science 1: Things Around Us. Department of Education and Culture, Republic of the Philippines, 1977.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.