Cities of Tomorrow (Organization) & Pröhl, M. (1997). Local economic development: International research and good practices for promoting employment. Bertelsmann Foundation Publishers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cities of Tomorrow (Organization) و Marga Pröhl. Local Economic Development: International Research and Good Practices for Promoting Employment. Gutersloh: Bertelsmann Foundation Publishers, 1997.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Cities of Tomorrow (Organization) و Marga Pröhl. Local Economic Development: International Research and Good Practices for Promoting Employment. Bertelsmann Foundation Publishers, 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.