Não informado. Periodontology Today. Southwest Society of Periodontists.
Chicago-viite (17. p.)Não informado. Periodontology Today. San Antonio, Tex: Southwest Society of Periodontists.
MLA-viite (8. p.)Não informado. Periodontology Today. Southwest Society of Periodontists.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.