APA (7e ed.) Bronvermelding

Science Education Center, U. o. t. P. (1972). Environmental science 1: Pupil's guide Part 1 and Part 2 (Revised experimental edition.). Science Education Center, University of the Philippines.

Chicago (17e ed.) Bronvermelding

Science Education Center, University of the Philippines. Environmental Science 1: Pupil's Guide Part 1 and Part 2. Revised experimental edition. Quezon City: Science Education Center, University of the Philippines, 1972.

MLA (9e ed.) Bronvermelding

Science Education Center, University of the Philippines. Environmental Science 1: Pupil's Guide Part 1 and Part 2. Revised experimental edition. Science Education Center, University of the Philippines, 1972.