APA (7th ed.) Citation

Seymour, R. A., & Heasman, P. A. (1992). Drugs, diseases, and the periodontium. Oxford University Press.

Chicago Style (17th ed.) Citation

Seymour, R. A., and Peter A. Heasman. Drugs, Diseases, and the Periodontium. Oxford ; New York: Oxford University Press, 1992.

MLA (9th ed.) Citation

Seymour, R. A., and Peter A. Heasman. Drugs, Diseases, and the Periodontium. Oxford University Press, 1992.