Não informado. (1959). Dental school newsletter. University of Puerto Rico, School of Dentistry.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Dental School Newsletter. San Juan: University of Puerto Rico, School of Dentistry, 1959.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Dental School Newsletter. University of Puerto Rico, School of Dentistry, 1959.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.