United States. Travel Service. (1979). Summary and analysis of international travel to/from the United States: Calendar year 1978 and historical series from 1970. U.S. Dept. of Commerce, U.S. Travel Service.
Chicago Style (17th ed.) CitationUnited States. Travel Service. Summary and Analysis of International Travel To/from the United States: Calendar Year 1978 and Historical Series from 1970. Washington, D.C: U.S. Dept. of Commerce, U.S. Travel Service, 1979.
MLA (9th ed.) CitationUnited States. Travel Service. Summary and Analysis of International Travel To/from the United States: Calendar Year 1978 and Historical Series from 1970. U.S. Dept. of Commerce, U.S. Travel Service, 1979.
Warning: These citations may not always be 100% accurate.