Douglas, . I. (1983). The Urban environment. Edward Arnold.
Chicago-čujuhus (17. p.)Douglas, Ian. The Urban Environment. London: Edward Arnold, 1983.
MLA-čujuhus (9. p.)Douglas, Ian. The Urban Environment. Edward Arnold, 1983.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.