Renn, J. Two aspects of a crisis of European culture: Jürgen Renn. Echo : an infrastructure to bring European cultural heritage online ; the foundation papers of a European initiative.(2002).
Lua i Stíl Chicago (17ú heag.)Renn, Jürgen. "Two Aspects of a Crisis of European Culture: Jürgen Renn." Echo : An Infrastructure to Bring European Cultural Heritage Online ; the Foundation Papers of a European Initiative.(2002) .
Lua MLA (8ú heag.)Renn, Jürgen. "Two Aspects of a Crisis of European Culture: Jürgen Renn." Echo : An Infrastructure to Bring European Cultural Heritage Online ; the Foundation Papers of a European Initiative.(2002), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.