Não informado. (2001). Annals of Periodontology. American Academy of Periodontology.
Lua i Stíl Chicago (17ú heag.)Não informado. Annals of Periodontology. Chicago, Ill: American Academy of Periodontology, 2001.
Lua MLA (8ú heag.)Não informado. Annals of Periodontology. American Academy of Periodontology, 2001.
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