Bonami, F. (2009). Helmut Middendorf: Over the under the over ; 1997 - 2009 ; [... on the occasion of the exhibition ...] / Benaki Museum, Athens. [In collaboration with the Macedonian Museum of Contemporary Art in Thessaloniki]. Kerber.
Chicago-viite (17. p.)Bonami, Francesco. Helmut Middendorf: Over the Under the over ; 1997 - 2009 ; [... on the Occasion of the Exhibition ...] / Benaki Museum, Athens. [In Collaboration with the Macedonian Museum of Contemporary Art in Thessaloniki]. Bielefel [u.a.]: Kerber, 2009.
MLA-viite (8. p.)Bonami, Francesco. Helmut Middendorf: Over the Under the over ; 1997 - 2009 ; [... on the Occasion of the Exhibition ...] / Benaki Museum, Athens. [In Collaboration with the Macedonian Museum of Contemporary Art in Thessaloniki]. Kerber, 2009.