Hartwigsen, G. L. (1980). Design concepts: A basic guide book. Allyn r Bacon.
Chicago Style (17th ed.) CitationHartwigsen, Gail Lynn. Design Concepts: A Basic Guide Book. Allyn r Bacon, 1980.
MLA (8th ed.) CitationHartwigsen, Gail Lynn. Design Concepts: A Basic Guide Book. Allyn r Bacon, 1980.
Warning: These citations may not always be 100% accurate.