Dyfyniad APA

(2000). Ports of the world 2001: Lloyd's list (19th ed.). Informa Publishing Group.

Dyfyniad Arddull Chicago

Ports of the World 2001: Lloyd's List. 19th ed. United Kingdom: Informa Publishing Group, 2000.

Dyfyniad MLA

Ports of the World 2001: Lloyd's List. 19th ed. Informa Publishing Group, 2000.

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