welch, s. .. a. (1990). American government. West Pub. Co..
Chicago-čujuhus (17. p.)welch, susan ...[et. al]. American Government. Saint Paul: West Pub. Co., 1990.
MLA-čujuhus (9. p.)welch, susan ...[et. al]. American Government. West Pub. Co., 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.