Não informado. (1924). Industrial hygiene bulletin. Department of Labor, Division of Industrial Hygiene.
Chicagoスタイル(17版)引用形式Não informado. Industrial Hygiene Bulletin. New York: Department of Labor, Division of Industrial Hygiene, 1924.
MLA(8版)引用形式Não informado. Industrial Hygiene Bulletin. Department of Labor, Division of Industrial Hygiene, 1924.
警告: この引用は必ずしも正確ではありません.