Hofmeister, B. (1969). Germany's industrial giant: By Burkhard Hofmeister.
Lua i Stíl Chicago (17ú heag.)Hofmeister, Burkhard. Germany's Industrial Giant: By Burkhard Hofmeister. London, 1969.
Lua MLA (8ú heag.)Hofmeister, Burkhard. Germany's Industrial Giant: By Burkhard Hofmeister. 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.