Friedrich, K. (1974). International economics: Concepts and issues. McGraw-Hill.
Chicago-čujuhus (17. p.)Friedrich, Klaus. International Economics: Concepts and Issues. New York: McGraw-Hill, 1974.
MLA-čujuhus (9. p.)Friedrich, Klaus. International Economics: Concepts and Issues. McGraw-Hill, 1974.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.