Russell. Rare Birds of North America. Princeton University Press.
Chicago-čujuhus (17. p.)Russell. Rare Birds of North America. Princeton University Press.
MLA-čujuhus (9. p.)Russell. Rare Birds of North America. Princeton University Press.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.