APA
UNITED NATIONS E. C. F. E., UNITED NATIONS E. C. F. E., . (1973). Housing requirements and demand. New York: United Nations U. S. A.
Chicago
UNITED NATIONS ECONOMIC COMMISSION FOR EUROPE, UNITED NATIONS ECONOMIC COMMISSION FOR EUROPE, . 1973. Housing requirements and demand. New York: United Nations U. S. A.
Harvard
UNITED NATIONS E. C. F. E., UNITED NATIONS E. C. F. E., . (1973). Housing requirements and demand. New York: United Nations U. S. A.
MLA
UNITED NATIONS ECONOMIC COMMISSION FOR EUROPE, UNITED NATIONS ECONOMIC COMMISSION FOR EUROPE, . Housing requirements and demand. New York: United Nations U. S. A. 1973.
