Não informado. (1961). American Family Physician. American Academy of General Practice.
Cita Chicago Style (17a ed.)Não informado. American Family Physician. Kansas City, Kan: American Academy of General Practice, 1961.
Cita MLA (8a ed.)Não informado. American Family Physician. American Academy of General Practice, 1961.
Precaución: Estas citas no son 100% exactas.