GOETSCH, D. L. (2014). Structural, civil, and pipe drafting. Delmar Cengage Learning.
Lua i Stíl Chicago (17ú heag.)GOETSCH, David L. Structural, Civil, and Pipe Drafting. Delmar Cengage Learning, 2014.
Lua MLA (9ú heag.)GOETSCH, David L. Structural, Civil, and Pipe Drafting. Delmar Cengage Learning, 2014.
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