APA
"UNITED NATIONS I. E. A. S. A. (., "UNITED NATIONS I. E. A. S. A. (., . (1990). Catalogue of transport studies 1970-90. New: York United Nations USA.
Chicago
"UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (D/0-)", "UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (D/0-)", . 1990. Catalogue of transport studies 1970-90. New: York United Nations USA.
Harvard
"UNITED NATIONS I. E. A. S. A. (., "UNITED NATIONS I. E. A. S. A. (., . (1990). Catalogue of transport studies 1970-90. New: York United Nations USA.
MLA
"UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (D/0-)", "UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (D/0-)", . Catalogue of transport studies 1970-90. New: York United Nations USA. 1990.