Não informado. (1961). American Family Physician. American Academy of General Practice.
Chicago-Zitierstil (17. Ausg.)Não informado. American Family Physician. Kansas City, Kan: American Academy of General Practice, 1961.
MLA-Zitierstil (8. Ausg.)Não informado. American Family Physician. American Academy of General Practice, 1961.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.