Poels, A. med001107: Gedenkpenning 40 uren arbeid 1 april 1937.
Cita Chicago (17th ed.)Poels, Albert. Med001107: Gedenkpenning 40 Uren Arbeid 1 April 1937.
Cita MLA (8th ed.)Poels, Albert. Med001107: Gedenkpenning 40 Uren Arbeid 1 April 1937.
Atenció: Aquestes cites poden no estar 100% correctes.