Pious, R. M. (1979). The american presidency. Basic Books.
Chicago-čujuhus (17. p.)Pious, Richard M. The American Presidency. Nueva York: Basic Books, 1979.
MLA-čujuhus (9. p.)Pious, Richard M. The American Presidency. Basic Books, 1979.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.