Keith Sonnier : Expanded File Series 1969/89.

MLA

Keith Sonnier : Expanded File Series 1969/89. Mönchengladbach: Städtisches Museum Abteiberg, 1990.

APA

(1990). Keith Sonnier : Expanded File Series 1969/89. Mönchengladbach: Städtisches Museum Abteiberg.

Chicago

Keith Sonnier: Expanded File Series 1969/89. Mönchengladbach: Städtisches Museum Abteiberg, 1990.