Hartwigsen, G. L. (1980). Design concepts: A basic guidebook. Allyn and Bacon.
Chicago Style (17th ed.) CitationHartwigsen, Gail Lynn. Design Concepts: A Basic Guidebook. Boston: Allyn and Bacon, 1980.
MLA citiranjeHartwigsen, Gail Lynn. Design Concepts: A Basic Guidebook. Allyn and Bacon, 1980.
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