APA (7 वां संस्करण) प्रशस्ति पत्र

(1972). Projections of educational statistics to 1981-82 (1972 ed.). U.S. Department of Health, Education and Welfare.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Projections of Educational Statistics to 1981-82. 1972 ed. Washington, D.C: U.S. Department of Health, Education and Welfare, 1972.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Projections of Educational Statistics to 1981-82. 1972 ed. U.S. Department of Health, Education and Welfare, 1972.

चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.