APA
"United Nations E. C. f. A. a. t. F. E., "United Nations E. C. f. A. a. t. F. E., . (1971). Manual on traffic surveys. New: York United Nations U. S. A.
Chicago
"United Nations Economic Commission for Asia and the Far East", "United Nations Economic Commission for Asia and the Far East", . 1971. Manual on traffic surveys. New: York United Nations U. S. A.
Harvard
"United Nations E. C. f. A. a. t. F. E., "United Nations E. C. f. A. a. t. F. E., . (1971). Manual on traffic surveys. New: York United Nations U. S. A.
MLA
"United Nations Economic Commission for Asia and the Far East", "United Nations Economic Commission for Asia and the Far East", . Manual on traffic surveys. New: York United Nations U. S. A. 1971.
