Science Education Center, University of the Philippines. (1969). Elementary school science 4: Pupil's guide (Expt. ed.). Science Education Center.
Dyfyniad Arddull ChicagoScience Education Center, University of the Philippines. Elementary School Science 4: Pupil's Guide. Expt. ed. Quezon City: Science Education Center, 1969.
Dyfyniad MLAScience Education Center, University of the Philippines. Elementary School Science 4: Pupil's Guide. Expt. ed. Science Education Center, 1969.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.