(2000). Science Anchor Levels. U.S. Department of Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रScience Anchor Levels. U.S. Department of Education, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रScience Anchor Levels. U.S. Department of Education, 2000.
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