Não informado. (1971). NCSDHA dental hygienist. Northern Californis State Dental Hygienists.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. NCSDHA Dental Hygienist. San Francisco, Calif: Northern Californis State Dental Hygienists, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. NCSDHA Dental Hygienist. Northern Californis State Dental Hygienists, 1971.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.