Renn, J. ECHO - an infrastructure to bring European cultural heritage online: Jürgen Renn. Echo : an infrastructure to bring European cultural heritage online ; the foundation papers of a European initiative.(2002).
Chicago-referens (17:e uppl.)Renn, Jürgen. "ECHO - an Infrastructure to Bring European Cultural Heritage Online: Jürgen Renn." Echo : An Infrastructure to Bring European Cultural Heritage Online ; the Foundation Papers of a European Initiative.(2002) .
MLA-referens (8:e uppl.)Renn, Jürgen. "ECHO - an Infrastructure to Bring European Cultural Heritage Online: Jürgen Renn." Echo : An Infrastructure to Bring European Cultural Heritage Online ; the Foundation Papers of a European Initiative.(2002), .
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