National Science Development Board. Education and Training Division, MInistry of Education and Culture, Region VIII, Divine Word University, & UP Science Education Center. (1981). IPSED modules for Leyte-Samar region. Published by the UP Science Education Center for NSDB.
Citazione stile Chigago Style (17a edizione)National Science Development Board. Education and Training Division, Region VIII MInistry of Education and Culture, Divine Word University, e UP Science Education Center. IPSED Modules for Leyte-Samar Region. Quezon City: Published by the UP Science Education Center for NSDB, 1981.
Citatione MLA (9a ed.)National Science Development Board. Education and Training Division, et al. IPSED Modules for Leyte-Samar Region. Published by the UP Science Education Center for NSDB, 1981.