*{{cite book ref-llibre| last cognom= Angolia | first nom= John | title títol= For Führer and Fatherland: Military Awards of the Third Reich | publisher editorial= R. James Bender Publishing | year any= 1987 | isbn = 0912138149 | ref = harv}}
*{{cite book ref-llibre| last cognom= Steiner | first nom= John Michael | title títol= Power Politics and Social Change in National Socialist Germany: A Process of Escalation into Mass Destruction | year any= 1976 | publisher editorial= Mouton | location lloc= The Hague | isbn = 978-90-279-7651-2 | ref = harv }}
