Lua APA (7ú heag.)

Institute For Scientific Co-operation. (1980). Economics. Laupp & Gobel, Tubingen.

Lua i Stíl Chicago (17ú heag.)

Institute For Scientific Co-operation. Economics. Federal Republic of Germany: Laupp & Gobel, Tubingen, 1980.

Lua MLA (9ú heag.)

Institute For Scientific Co-operation. Economics. Laupp & Gobel, Tubingen, 1980.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.