the SS & German Police. 1 Reichsführer SS – Gruppenführer (Georg Ahrens to Karl Gutenberger). R. James Bender Publishing. 2006. ISBN 978-9-329-70037-2.

路德维希·伯恩

Hugh (编). Börne, Karl Ludwig. Encyclopædia Britannica 4 (第11版). London: Cambridge University Press: 255–256. 1911. Mendes-Flohr, Paul R; Reinharz, Jehuda

2001年5月逝世人物列表

B 8 [9 July 2023]. 含有連結內容需訂閱查看的頁面 (link) Olympedia - René Bondoux. olympedia.org. OlyMADMen. [9 July 2023]. Karl Wilhelm Krause. catalogue.bnf.fr. Bibliothèque

2001年8月逝世人物列表

Kozinn. Karl Ulrich Schnabel, Pianist, 92; Favored 4-Hand Repertory. The New York Times. 30 August 2001: B 9 [4 April 2021]. 含有連結內容需訂閱查看的頁面 (link) Bert

馬克思的異化論

State. Axelos, Kostas. Alienation and Techne in the Thought of Karl Marx. Blackledge, Paul. 2008. "Marxism and Ethics （页面存档备份，存于互联网档案馆）." International

Found in articles

库尔特·冯·戈特贝格