Patterson, J. T. (1976). America in the twentieth century. Harcourt.
Chicago-čujuhus (17. p.)Patterson, James T. America in the Twentieth Century. New York: Harcourt, 1976.
MLA-čujuhus (9. p.)Patterson, James T. America in the Twentieth Century. Harcourt, 1976.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.