Não informado. (1980). Compendium of Continuing Education in Dentistry. Dental Learning Systems.
Chicago-Zitierstil (17. Ausg.)Não informado. Compendium of Continuing Education in Dentistry. Newtown, Pa: Dental Learning Systems, 1980.
MLA-Zitierstil (8. Ausg.)Não informado. Compendium of Continuing Education in Dentistry. Dental Learning Systems, 1980.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.