Não informado. (1971). American Family Physician. American Academy of Family Physicians.
Cita Chicago Style (17a ed.)Não informado. American Family Physician. Kansas City, Kan: American Academy of Family Physicians, 1971.
Cita MLA (8a ed.)Não informado. American Family Physician. American Academy of Family Physicians, 1971.
Precaución: Estas citas no son 100% exactas.