Science Education Center, U. o. t. P. (1973). Environmental Science 2: Pupil's guide. part 1 (Revised experimental edition.). Science Education Center, University of the Philippines.
Chicago Style (17. basım) AtıfScience Education Center, University of the Philippines. Environmental Science 2: Pupil's Guide. Part 1. Revised experimental edition. Quezon City: Science Education Center, University of the Philippines, 1973.
MLA (9th ed.) AtıfScience Education Center, University of the Philippines. Environmental Science 2: Pupil's Guide. Part 1. Revised experimental edition. Science Education Center, University of the Philippines, 1973.
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