Institute For Scientific Co-operation. (1980). Economics. Laupp & Gobel, Tubingen.
Chicago-viite (17. p.)Institute For Scientific Co-operation. Economics. Federal Republic of Germany: Laupp & Gobel, Tubingen, 1980.
MLA-viite (9. p.)Institute For Scientific Co-operation. Economics. Laupp & Gobel, Tubingen, 1980.