Não informado. (1922). Venereal Disease Information. U.S. Public Health Service, Venereal Disease Division.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Venereal Disease Information. Washington: U.S. Public Health Service, Venereal Disease Division, 1922.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Venereal Disease Information. U.S. Public Health Service, Venereal Disease Division, 1922.
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