Não informado. (1955). Journal of the Royal Society of Health. Royal Society of Health.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Royal Society of Health. London: Royal Society of Health, 1955.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Royal Society of Health. Royal Society of Health, 1955.
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