Dyfyniad APA

Wright, P. H., & Paquette, R. J. (1987). Highway engineering (4th ed.). John Wiley.

Dyfyniad Arddull Chicago

Wright, Paul H., and Radnor J. Paquette. Highway Engineering. 4th ed. New York: John Wiley, 1987.

Dyfyniad MLA

Wright, Paul H., and Radnor J. Paquette. Highway Engineering. 4th ed. John Wiley, 1987.

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