Johnson, L. K. (1991). America as a world power: Foreign policy in a constitutional framework. McGraw-Hill.
Chicago-čujuhus (17. p.)Johnson, Loch K. America as a World Power: Foreign Policy in a Constitutional Framework. New York: McGraw-Hill, 1991.
MLA-čujuhus (9. p.)Johnson, Loch K. America as a World Power: Foreign Policy in a Constitutional Framework. McGraw-Hill, 1991.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.