Villablanca, R. E. (1976). Suggested test items for elementary school science IV developed by the University of the Philippines Science Education Center.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVillablanca, Rolando Enerez. Suggested Test Items for Elementary School Science IV Developed by the University of the Philippines Science Education Center. 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVillablanca, Rolando Enerez. Suggested Test Items for Elementary School Science IV Developed by the University of the Philippines Science Education Center. 1976.
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