(1991). Horst Janssen: Drawings and etchings ; April 3 to May 12, 1990 (2. compl. ed.). Verl. St. Gertrude u.a.
Chicago Style (17th ed.) CitationHorst Janssen: Drawings and Etchings ; April 3 to May 12, 1990. 2. compl. ed. Hamburg: Verl. St. Gertrude u.a, 1991.
MLA (9th ed.) CitationHorst Janssen: Drawings and Etchings ; April 3 to May 12, 1990. 2. compl. ed. Verl. St. Gertrude u.a, 1991.
Warning: These citations may not always be 100% accurate.