Não informado. Urban and regional technology and development. U.S. Department of Commerce, National Technical Information Service.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Urban and Regional Technology and Development. Springfield, Va: U.S. Department of Commerce, National Technical Information Service.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Urban and Regional Technology and Development. U.S. Department of Commerce, National Technical Information Service.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.