Institute For Scientific Co-operation. (1980). Economics. Laupp & Gobel, Tubingen.
Style de citation Chicago (17e éd.)Institute For Scientific Co-operation. Economics. Federal Republic of Germany: Laupp & Gobel, Tubingen, 1980.
Style de citation MLA (9e éd.)Institute For Scientific Co-operation. Economics. Laupp & Gobel, Tubingen, 1980.