DDR design

MLA

Hedler, Ernst, and Ralf Ulrich. Ddr Design. Köln: Taschen, 2004.

APA

Hedler, E., & Ulrich, R. (2004). DDR design. Köln: Taschen.

Chicago

Hedler, Ernst, and Ralf Ulrich. DDR Design. Köln: Taschen, 2004.