APA (7th ed.) Citation

Chicago Park District. (1993). Map of the Chicago Park District. Park District?].

Chicago Style (17th ed.) Citation

Chicago Park District. Map of the Chicago Park District. [Chicago: Park District?], 1993.

MLA (8th ed.) Citation

Chicago Park District. Map of the Chicago Park District. Park District?], 1993.

Warning: These citations may not always be 100% accurate.