Não informado. (1952). Work study. Institute of Industrial Technicians.
Chicagoスタイル(17版)引用形式Não informado. Work Study. London: Institute of Industrial Technicians, 1952.
MLA(8版)引用形式Não informado. Work Study. Institute of Industrial Technicians, 1952.
警告: この引用は必ずしも正確ではありません.