Helmut Middendorf : : Water on paper (Exhibition Athene, Eleni Koroneou Gallery, 1994 ; Frankfurt, Galerie Hirschmann, 1994).

MLA

Helmut Middendorf : Water On Paper (exhibition Athene, Eleni Koroneou Gallery, 1994 ; Frankfurt, Galerie Hirschmann, 1994). Athene: Eleni Koroneou Gallery, 1994.

APA

(1994). Helmut Middendorf : Water on paper (Exhibition Athene, Eleni Koroneou Gallery, 1994 ; Frankfurt, Galerie Hirschmann, 1994). Athene: Eleni Koroneou Gallery.

Chicago

Helmut Middendorf: Water On Paper (exhibition Athene, Eleni Koroneou Gallery, 1994 ; Frankfurt, Galerie Hirschmann, 1994). Athene: Eleni Koroneou Gallery, 1994.