Walker art center & Friedman, M. S. (1989). Graphic design in America: A visual language history. Walker Art center.
Chicago-čujuhus (17. p.)Walker art center juo Mildred S. Friedman. Graphic Design in America: A Visual Language History. Minneapolis: Walker Art center, 1989.
MLA-čujuhus (9. p.)Walker art center juo Mildred S. Friedman. Graphic Design in America: A Visual Language History. Walker Art center, 1989.
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