Não informado. (1976). Occupational Health and Safety. Stevens Publishing.
Chicagoスタイル(17版)引用形式Não informado. Occupational Health and Safety. Waco, Tex: Stevens Publishing, 1976.
MLA(8版)引用形式Não informado. Occupational Health and Safety. Stevens Publishing, 1976.
警告: この引用は必ずしも正確ではありません.