Vitug, C. P. (1976). An item-analysis and validity study of the science education center elementary mathematics tests for grades 1, 2, and 3. University of the Philippines Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVitug, Carolina P. An Item-analysis and Validity Study of the Science Education Center Elementary Mathematics Tests for Grades 1, 2, and 3. Quezon City: University of the Philippines Library, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVitug, Carolina P. An Item-analysis and Validity Study of the Science Education Center Elementary Mathematics Tests for Grades 1, 2, and 3. University of the Philippines Library, 1976.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.