Não informado. (1971). American Family Physician. American Academy of Family Physicians.
Chicagoスタイル(17版)引用形式Não informado. American Family Physician. Kansas City, Kan: American Academy of Family Physicians, 1971.
MLA(8版)引用形式Não informado. American Family Physician. American Academy of Family Physicians, 1971.
警告: この引用は必ずしも正確ではありません.