Pyke, F., & Sengenberger, W. (1992). Industrial districts and local economic regeneration. International Institute for Labour Studies.
Lua i Stíl Chicago (17ú heag.)Pyke, F., agus Werner Sengenberger. Industrial Districts and Local Economic Regeneration. Geneva: International Institute for Labour Studies, 1992.
Lua MLA (9ú heag.)Pyke, F., agus Werner Sengenberger. Industrial Districts and Local Economic Regeneration. International Institute for Labour Studies, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.