Dyfyniad APA

Stubbs, P. C. (1980). Transports economics. London: George Allen & Unwin.

Dyfyniad Arddull Chicago

Stubbs, P. C. Transports Economics. London: George Allen & Unwin, 1980.

Dyfyniad MLA

Stubbs, P. C. Transports Economics. London: George Allen & Unwin, 1980.

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