Dyfyniad APA

(2019). Airline business. Reed Business Information.

Dyfyniad Arddull Chicago

Airline Business. London: Reed Business Information, 2019.

Dyfyniad MLA

Airline Business. Reed Business Information, 2019.

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