(1972). Projections of educational statistics to 1981-82 (1972 ed.). U.S. Department of Health, Education and Welfare.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रProjections of Educational Statistics to 1981-82. 1972 ed. Washington, D.C: U.S. Department of Health, Education and Welfare, 1972.
एमएलए (9वां संस्करण) प्रशस्ति पत्रProjections of Educational Statistics to 1981-82. 1972 ed. U.S. Department of Health, Education and Welfare, 1972.
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