Cite
MLA (8th Edition)
Metropolitan Areas (msas, Cmsas, and Pmsas) June 30, 1990. The Bureau, For sale by the Supt. of Docs., U.S. G.P.O, 1990.
APA (7th Edition)
Metropolitan areas (MSAs, CMSAs, and PMSAs) June 30, 1990. (1990). The Bureau, For sale by the Supt. of Docs., U.S. G.P.O.
Chicago (17th Edition)
“Metropolitan Areas (MSAs, CMSAs, and PMSAs) June 30, 1990.” Washington, D.C.: The Bureau, For sale by the Supt. of Docs., U.S. G.P.O, 1990.