Dyfyniad APA

ebrary, Inc. (2003). Exploration of the seas: Voyage into the unknown. National Academies Press.

Dyfyniad Arddull Chicago

ebrary, Inc. Exploration of the Seas: Voyage into the Unknown. Washington, D.C.: National Academies Press, 2003.

Dyfyniad MLA

ebrary, Inc. Exploration of the Seas: Voyage into the Unknown. National Academies Press, 2003.

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