Não informado. (1927). Public safety. National Safety Council.
Chicagoスタイル(17版)引用形式Não informado. Public Safety. Chicago, Ill: National Safety Council, 1927.
MLA(8版)引用形式Não informado. Public Safety. National Safety Council, 1927.
警告: この引用は必ずしも正確ではありません.