menzies, G. 1421: The year china discovered america. Perrenial.
Chicago-čujuhus (17. p.)menzies, Gavin. 1421: The Year China Discovered America. New York: Perrenial.
MLA-čujuhus (9. p.)menzies, Gavin. 1421: The Year China Discovered America. Perrenial.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.