Giesecke, F. E. (2009). Technical drawing (13th ed.). Pearson Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Giesecke, Frederick E. Technical Drawing. 13th ed. Upper Saddle River, N.J.: Pearson Prentice Hall, 2009.
Lua MLA (8ú heag.)Giesecke, Frederick E. Technical Drawing. 13th ed. Pearson Prentice Hall, 2009.
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