Dyfyniad APA
Schofield,W, & M.Breach. (2007). Engineering Surveying (6th ed.). Spon Presss.
Dyfyniad Arddull Chicago
Schofield,W, and M.Breach. Engineering Surveying. 6th ed. New York: Spon Presss, 2007.
Dyfyniad MLA
Schofield,W, and M.Breach. Engineering Surveying. 6th ed. Spon Presss, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.