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Lua i Stíl Chicago (17ú heag.)European Centre for the Co-ordination of Research and Documentation in Social Sciences, United Nations Research Institute for Social Development, Antoni Kukliński, agus Riccardo Petrella. Growth Poles and Regional Policies: A Seminar. The Hague: Mouton, 1972.
Lua MLA (8ú heag.)European Centre for the Co-ordination of Research and Documentation in Social Sciences, et al. Growth Poles and Regional Policies: A Seminar. Mouton, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.