Dyfyniad APA
Wright, P. H. (1996). Highway engineering (6th ed.). John Wiley.
Dyfyniad Arddull Chicago
Wright, Paul H. Highway Engineering. 6th ed. New York: John Wiley, 1996.
Dyfyniad MLA
Wright, Paul H. Highway Engineering. 6th ed. John Wiley, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.