menzies, G. 1421: The year china discovered america. Perrenial.
Chicago Style (17th ed.) Citationmenzies, Gavin. 1421: The Year China Discovered America. New York: Perrenial.
MLA (9th ed.) Citationmenzies, Gavin. 1421: The Year China Discovered America. Perrenial.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.