Dyfyniad APA

(1987). The travel and tourism industry. Oxford: Pergamon Press.

Dyfyniad Arddull Chicago

The Travel and Tourism Industry. Oxford: Pergamon Press, 1987.

Dyfyniad MLA

The Travel and Tourism Industry. Oxford: Pergamon Press, 1987.

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