APA
(1970). Journal of Periodontololgy. New York: Amercan Academy of Periodontology.
Chicago
1970. Journal of Periodontololgy. New York: Amercan Academy of Periodontology.
Harvard
(1970). Journal of Periodontololgy. New York: Amercan Academy of Periodontology.
MLA
Journal of Periodontololgy. New York: Amercan Academy of Periodontology. 1970.
