Dyfyniad APA

Sarna. (2010). Formers cruises and ports of call (7.). Wiley.

Dyfyniad Arddull Chicago

Sarna. Formers Cruises and Ports of Call. 7. Wiley, 2010.

Dyfyniad MLA

Sarna. Formers Cruises and Ports of Call. 7. Wiley, 2010.

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