Dyfyniad APA

French, T. E., Vierck, C. J., & Foster, R. J. (1986). Engineering drawing and graphic technology (13th ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

French, Thomas Ewing, Charles J. Vierck, and Robert J. Foster. Engineering Drawing and Graphic Technology. 13th ed. New York: McGraw-Hill, 1986.

Dyfyniad MLA

French, Thomas Ewing, et al. Engineering Drawing and Graphic Technology. 13th ed. McGraw-Hill, 1986.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.