Richard Long : : Wind circle Memory Sticks (Exhibition Duisburg, Wilhelm Lehmbruck Museum, 19.01.1997 - 30.03.1997).

MLA

Heller, Renate Heidt. Richard Long : Wind Circle Memory Sticks (exhibition Duisburg, Wilhelm Lehmbruck Museum, 19.01.1997 - 30.03.1997). Duisburg: Wilhelm Lehmbruck Museum, 1997.

APA

Heller, R. Heidt. (1997). Richard Long : Wind circle Memory Sticks (Exhibition Duisburg, Wilhelm Lehmbruck Museum, 19.01.1997 - 30.03.1997). Duisburg: Wilhelm Lehmbruck Museum.

Chicago

Heller, Renate Heidt Richard Long: Wind Circle Memory Sticks (exhibition Duisburg, Wilhelm Lehmbruck Museum, 19.01.1997 - 30.03.1997). Duisburg: Wilhelm Lehmbruck Museum, 1997.