APA (7th ed.) Citation

Gazetteer Publishing Co. (Denver, Colo.). Colorado state business directory. J.A. Blake.

Chicago Style (17th ed.) Citation

Gazetteer Publishing Co. (Denver, Colo.). Colorado State Business Directory. Denver, Col.: J.A. Blake.

MLA (9th ed.) Citation

Gazetteer Publishing Co. (Denver, Colo.). Colorado State Business Directory. J.A. Blake.

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