Não informado. (1976). General Dentistry. Academy of General Dentistry.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. General Dentistry. Chicago, Ill: Academy of General Dentistry, 1976.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. General Dentistry. Academy of General Dentistry, 1976.
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