Gaya APA

Nield-Gehrig, J, S., Willman, D, E. (2010). Foundations Of Periodontics for the Dental Hygienist (2). USA : Wiley Blackwell.

Gaya MLA

Nield-Gehrig, Jill, S.., Willman, Donald, E.. "Foundations Of Periodontics for the Dental Hygienist". 2 USA : Wiley Blackwell, 2010. Text.