APA (7 वां संस्करण) प्रशस्ति पत्र

Não informado. Public Health Service Publications. U.S. Department of Health Education and Welfare.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Não informado. Public Health Service Publications. Washington: U.S. Department of Health Education and Welfare.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Não informado. Public Health Service Publications. U.S. Department of Health Education and Welfare.

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