Science Education Center, U. o. t. P. (1972). Elementary school mathematics 1: Teacher's Guide. Science Education Center, University of the Philippines.
Citazione stile Chigago Style (17a edizione)Science Education Center, University of the Philippines. Elementary School Mathematics 1: Teacher's Guide. Quezon City: Science Education Center, University of the Philippines, 1972.
Citatione MLA (9a ed.)Science Education Center, University of the Philippines. Elementary School Mathematics 1: Teacher's Guide. Science Education Center, University of the Philippines, 1972.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.