Simpson. River City and Valley Life. University of Pittsburgh Press.
Chicago-čujuhus (17. p.)Simpson. River City and Valley Life. University of Pittsburgh Press.
MLA-čujuhus (9. p.)Simpson. River City and Valley Life. University of Pittsburgh Press.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.