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Dyfyniad Arddull Chicago.Vuchic, Vukan R. Urban Public Transportation: Systems and Technology. Englewood Cliffs, N.J.: Prentice-Hall, 1981.
Dyfyniad MLA.Vuchic, Vukan R. Urban Public Transportation: Systems and Technology. Prentice-Hall, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.