Não informado. (1931). Cleveland Clinic Quarterly. Cleveland Clinic Educational Foundation.
Chicago-Zitierstil (17. Ausg.)Não informado. Cleveland Clinic Quarterly. Cleveland, Ohio: Cleveland Clinic Educational Foundation, 1931.
MLA-Zitierstil (8. Ausg.)Não informado. Cleveland Clinic Quarterly. Cleveland Clinic Educational Foundation, 1931.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.