United States. Bureau of the Census. (1979). Selected characteristics of travel to work in the Portland SMSA, 1975. U.S. Dept. of Commerce, Bureau of the Census.
Chicago Style (17th ed.) CitationUnited States. Bureau of the Census. Selected Characteristics of Travel to Work in the Portland SMSA, 1975. Washington, D.C.: U.S. Dept. of Commerce, Bureau of the Census, 1979.
MLA (9th ed.) CitationUnited States. Bureau of the Census. Selected Characteristics of Travel to Work in the Portland SMSA, 1975. U.S. Dept. of Commerce, Bureau of the Census, 1979.
Warning: These citations may not always be 100% accurate.