Não informado. (1971). Nation's Health. American Public Health Association.
Chicagoスタイル(17版)引用形式Não informado. Nation's Health. New York: American Public Health Association, 1971.
MLA(8版)引用形式Não informado. Nation's Health. American Public Health Association, 1971.
警告: この引用は必ずしも正確ではありません.