Sjak Marks : North America 1969.

MLA

Sjak Marks : North America 1969. Eindhoven: Van Abbemuseum, 1969.

APA

(1969). Sjak Marks : North America 1969. Eindhoven: Van Abbemuseum.

Chicago

Sjak Marks: North America 1969. Eindhoven: Van Abbemuseum, 1969.