Koch, E. (1985). Officialisation of cooperatives in developing countries. Fridrich-Ebert-Stiftung.
Lua i Stíl Chicago (17ú heag.)Koch, Eckard. Officialisation of Cooperatives in Developing Countries. Bonn: Fridrich-Ebert-Stiftung, 1985.
Lua MLA (9ú heag.)Koch, Eckard. Officialisation of Cooperatives in Developing Countries. Fridrich-Ebert-Stiftung, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.