Ingram, J. C. (1970). International economic problem (2nd ed.). John Wiley.
Chicago-čujuhus (17. p.)Ingram, James C. International Economic Problem. 2nd ed. NewYork: John Wiley, 1970.
MLA-čujuhus (9. p.)Ingram, James C. International Economic Problem. 2nd ed. John Wiley, 1970.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.