Não informado. (1976). The Journal of the Western Society of Periodontology. Western Society of Periodontology.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Journal of the Western Society of Periodontology. Los Angeles, Calif: Western Society of Periodontology, 1976.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Journal of the Western Society of Periodontology. Western Society of Periodontology, 1976.
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