Horst Janssen; drawings 1979-1983; etchings 1970-1983

MLA

Heller, R, and H Janssen. Horst Janssen; Drawings 1979-1983; Etchings 1970-1983. Hamburg: Brockstedt, 1983.

APA

Heller, R., & Janssen, H. (1983). Horst Janssen; drawings 1979-1983; etchings 1970-1983. Hamburg: Brockstedt.

Chicago

Heller, R., and H Janssen. Horst Janssen; Drawings 1979-1983; Etchings 1970-1983. Hamburg: Brockstedt, 1983.