Brusentsev. Disasters in the United States. W.E. Upjohn Institute.
Chicago-čujuhus (17. p.)Brusentsev. Disasters in the United States. W.E. Upjohn Institute.
MLA-čujuhus (9. p.)Brusentsev. Disasters in the United States. W.E. Upjohn Institute.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.