Gaya APA

Beemsterboer, D, A, P, P, L. (2007). Periodontology for The Dental Hygienist . : Saunders Elsevier.

Gaya MLA

Beemsterboer, Dorothy, A., Perry;, Phyllis, L.. "Periodontology for The Dental Hygienist". : Saunders Elsevier, 2007. Text.