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).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRenn, 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) .
एमएलए (8वां संस्करण) प्रशस्ति पत्रRenn, 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), .
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.