APA (7th ed.) Citation

Chicago Transit Authority. (1953). Chicago Transit Authority system map. Chicago Transit Authority.

Chicago Style (17th ed.) Citation

Chicago Transit Authority. Chicago Transit Authority System Map. Chicago, Ill.: Chicago Transit Authority, 1953.

MLA (8th ed.) Citation

Chicago Transit Authority. Chicago Transit Authority System Map. Chicago Transit Authority, 1953.

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