Steinmetz, W. (2012). Some thoughts on a history of Twentieth-Century German basic concepts: Willibald Steinmetz. Contributions to the history of concepts.
Lua i Stíl Chicago (17ú heag.)Steinmetz, Willibald. "Some Thoughts on a History of Twentieth-Century German Basic Concepts: Willibald Steinmetz." Contributions to the History of Concepts 2012.
Lua MLA (8ú heag.)Steinmetz, Willibald. "Some Thoughts on a History of Twentieth-Century German Basic Concepts: Willibald Steinmetz." Contributions to the History of Concepts, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.