(1930). [Map of Chicago showing census tracts and enumeration districts, probably for 1930]. [publisher not identified].
Chicago Style (17th ed.) Citation[Map of Chicago Showing Census Tracts and Enumeration Districts, Probably for 1930]. [Place of publication not identified]: [publisher not identified], 1930.
MLA (8th ed.) Citation[Map of Chicago Showing Census Tracts and Enumeration Districts, Probably for 1930]. [publisher not identified], 1930.
Warning: These citations may not always be 100% accurate.