Dyfyniad APA

International Transport Workers' Federation (ITF). (1999). Panorama ITF de l'aviation civile 1999. Bruxelles: ITF.

Dyfyniad Arddull Chicago

International Transport Workers' Federation (ITF). Panorama ITF De L'aviation Civile 1999. Bruxelles: ITF, 1999.

Dyfyniad MLA

International Transport Workers' Federation (ITF). Panorama ITF De L'aviation Civile 1999. Bruxelles: ITF, 1999.

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