Institute For Scientific Co-operation. (1980). Economics. Laupp & Gobel, Tubingen.
Chicago-čujuhus (17. p.)Institute For Scientific Co-operation. Economics. Federal Republic of Germany: Laupp & Gobel, Tubingen, 1980.
MLA-čujuhus (9. p.)Institute For Scientific Co-operation. Economics. Laupp & Gobel, Tubingen, 1980.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.