Não informado. (1959). Dental school newsletter. University of Puerto Rico, School of Dentistry.
Chicago-referens (17:e uppl.)Não informado. Dental School Newsletter. San Juan: University of Puerto Rico, School of Dentistry, 1959.
MLA-referens (8:e uppl.)Não informado. Dental School Newsletter. University of Puerto Rico, School of Dentistry, 1959.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.