European Foundation for the Improvement of Living and Working Conditions & Deelstra, T. (1992). Cities and the global environment: Proceedings of a European workshop, the Hague 5-7 December 1990. European Foundation for the Improvement of Living and Working Conditions.
Παραπομπή σε μορφή Chicago (17η εκδ.)European Foundation for the Improvement of Living and Working Conditions και Tjeerd Deelstra. Cities and the Global Environment: Proceedings of a European Workshop, the Hague 5-7 December 1990. Dublin: European Foundation for the Improvement of Living and Working Conditions, 1992.
Παραπομπή σε μορφή MLA (9th εκδ.)European Foundation for the Improvement of Living and Working Conditions και Tjeerd Deelstra. Cities and the Global Environment: Proceedings of a European Workshop, the Hague 5-7 December 1990. European Foundation for the Improvement of Living and Working Conditions, 1992.