Não informado. (1989). Practical Periodontics and Aesthetic Dentistry. Montage Media Corporation.
Chicago-Zitierstil (17. Ausg.)Não informado. Practical Periodontics and Aesthetic Dentistry. Mahwah, NJ: Montage Media Corporation, 1989.
MLA-Zitierstil (8. Ausg.)Não informado. Practical Periodontics and Aesthetic Dentistry. Montage Media Corporation, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.