Documenta Information 2.

MLA

Helms, Dietrich. Documenta Information 2. Kassel: Museum Fridericianum, 1968.

APA

Helms, D. (1968). Documenta Information 2. Kassel: Museum Fridericianum.

Chicago

Helms, Dietrich Documenta Information 2. Kassel: Museum Fridericianum, 1968.