Dyfyniad APA

(1976). Directory of transportation education. Department of Transportation.

Dyfyniad Arddull Chicago

Directory of Transportation Education. Washington, D.C: Department of Transportation, 1976.

Dyfyniad MLA

Directory of Transportation Education. Department of Transportation, 1976.

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