Peterson, R. T. (1956). A fiels guide to the birds (2ª ed.). Houghton Miffin Company.
Chicago-čujuhus (17. p.)Peterson, Roger Tory. A Fiels Guide to the Birds. 2ª ed. Houghton Miffin Company, 1956.
MLA-čujuhus (9. p.)Peterson, Roger Tory. A Fiels Guide to the Birds. 2ª ed. Houghton Miffin Company, 1956.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.