Não informado. Urban and regional technology and development. U.S. Department of Commerce, National Technical Information Service.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Urban and Regional Technology and Development. Springfield, Va: U.S. Department of Commerce, National Technical Information Service.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Urban and Regional Technology and Development. U.S. Department of Commerce, National Technical Information Service.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.