Coggins, J. (1989). Trade unions of the world 1989-1990 (2nd ed.). Longman.
Lua i Stíl Chicago (17ú heag.)Coggins, John. Trade Unions of the World 1989-1990. 2nd ed. Harlow: Longman, 1989.
Lua MLA (8ú heag.)Coggins, John. Trade Unions of the World 1989-1990. 2nd ed. Longman, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.