Spence , W. P. (1980). Drafting: Technology and practice. Bennett publishing.
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Dyfyniad Arddull Chicago
Spence , William P. Drafting: Technology and Practice. Peoria: Bennett publishing, 1980.
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Dyfyniad MLA
Spence , William P. Drafting: Technology and Practice. Bennett publishing, 1980.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.