Pred, A. r. 1. (1977). City systems in advanced economics: Past growth, present processes, and future development options. Wiley.
Chicago-referens (17:e uppl.)Pred, Allan richard 1936. City Systems in Advanced Economics: Past Growth, Present Processes, and Future Development Options. New york: Wiley, 1977.
MLA-referens (9:e uppl.)Pred, Allan richard 1936. City Systems in Advanced Economics: Past Growth, Present Processes, and Future Development Options. Wiley, 1977.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.