Coba jelasin Literatur dari Friedrich Siemens dong

Karl Burhenne: Siemens. In: Allgemeine Deutsche Biographie (ADB). Volume 55, Duncker & Humblot, Leipzig 1910, pp. 203–228. (Family article - see p. 219)

August Roth: Friedrich August Siemens. in: Siemens magazine, Volume 6, Issue 12 (December 1926), pp. 581–590

Wilhelm Rothert: General Hannoversche Biography, Volume 2: In the Old Kingdom of Hanover 1814–1866; Hanover: Sponholtz, 1914, pp. 445–462 (Werner von Siemens and his brothers)

Frank Wittendorfer: Siemens, Friedrich August. In: New German Biography (NDB). Volume 24, Duncker & Humblot, Berlin 2010, , p. 374 f. (Digitized version).