Não informado. (1933). Northwest Dentistry. Minnesota State Dental Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Northwest Dentistry. Saint Paul, Minn: Minnesota State Dental Association, 1933.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Northwest Dentistry. Minnesota State Dental Association, 1933.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.