ebrary, Inc. (2003). Exploration of the seas: Voyage into the unknown. National Academies Press.
Chicago-referens (17:e uppl.)ebrary, Inc. Exploration of the Seas: Voyage into the Unknown. Washington, D.C.: National Academies Press, 2003.
MLA-referens (9:e uppl.)ebrary, Inc. Exploration of the Seas: Voyage into the Unknown. National Academies Press, 2003.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.