Cofnodi Dyfyniadau
Dyfyniad APA
Giesecke, F. E. (1991). Technical drawing (9th ed.). Macmillan Pub. Co. ; Collier Macmillan Canada.
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Dyfyniad Arddull Chicago
Giesecke, Frederick Ernest. Technical Drawing. 9th ed. New York : Toronto: Macmillan Pub. Co. ; Collier Macmillan Canada, 1991.
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Dyfyniad MLA
Giesecke, Frederick Ernest. Technical Drawing. 9th ed. Macmillan Pub. Co. ; Collier Macmillan Canada, 1991.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.