Poels, A. med001107: Gedenkpenning 40 uren arbeid 1 april 1937.
Chicagoスタイル(17版)引用形式Poels, Albert. Med001107: Gedenkpenning 40 Uren Arbeid 1 April 1937.
MLA(8版)引用形式Poels, Albert. Med001107: Gedenkpenning 40 Uren Arbeid 1 April 1937.
警告: この引用は必ずしも正確ではありません.