Não informado. (1980). Compendium of Continuing Education in Dentistry. Dental Learning Systems.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Compendium of Continuing Education in Dentistry. Newtown, Pa: Dental Learning Systems, 1980.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Compendium of Continuing Education in Dentistry. Dental Learning Systems, 1980.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.