Cite

Washington, minor civil divisions / Bureau of the Census, 1930.

MLA

of the Census, United States. Bureau. Washington, Minor Civil Divisions / Bureau of the Census, 1930. Government Printing Office, 1934. https://collections.library.yale.edu/catalog/15821681.

APA, 6th edition

of the Census, U. S. B. (1934). Washington, minor civil divisions / Bureau of the Census, 1930. [Maps]. Government Printing Office, https://collections.library.yale.edu/catalog/15821681.