Institute For Scientific Co-operation. (1980). Economics. Laupp & Gobel, Tubingen.
Čikaški stil citiranja (17. izdanje)Institute For Scientific Co-operation. Economics. Federal Republic of Germany: Laupp & Gobel, Tubingen, 1980.
MLA način citiranja (9. izdanje)Institute For Scientific Co-operation. Economics. Laupp & Gobel, Tubingen, 1980.