Dyfyniad APA

Gillen, D. W. (1990). Free trade in airline services: Assessing proposals to liberalize the Canada-U.S. air transport bilateral. Institute of Transportation Studies.

Dyfyniad Arddull Chicago

Gillen, David W. Free Trade in Airline Services: Assessing Proposals to Liberalize the Canada-U.S. Air Transport Bilateral. Berkeley, California: Institute of Transportation Studies, 1990.

Dyfyniad MLA

Gillen, David W. Free Trade in Airline Services: Assessing Proposals to Liberalize the Canada-U.S. Air Transport Bilateral. Institute of Transportation Studies, 1990.

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