APA
"United Nations e. c. f. E., "United Nations e. c. f. E., . (1990). Directory of bodies concerned with urbab and regional research. New: York United Nations USA.
Chicago
"United Nations economic commission for Europe", "United Nations economic commission for Europe", . 1990. Directory of bodies concerned with urbab and regional research. New: York United Nations USA.
Harvard
"United Nations e. c. f. E., "United Nations e. c. f. E., . (1990). Directory of bodies concerned with urbab and regional research. New: York United Nations USA.
MLA
"United Nations economic commission for Europe", "United Nations economic commission for Europe", . Directory of bodies concerned with urbab and regional research. New: York United Nations USA. 1990.