APA (7th ed.) Citation

Montana. Travel Montana, Chamber of Commerce (Butte, Mont.), & Montana. Department of Commerce. (1990). Butte, Montana city map: Gateway to Montana's historic cultural area, the Copperway. [publisher not identified].

Chicago Style (17th ed.) Citation

Montana. Travel Montana, Mont.) Chamber of Commerce (Butte, and Montana. Department of Commerce. Butte, Montana City Map: Gateway to Montana's Historic Cultural Area, the Copperway. [Butte, Mont.?]: [publisher not identified], 1990.

MLA (9th ed.) Citation

Montana. Travel Montana, et al. Butte, Montana City Map: Gateway to Montana's Historic Cultural Area, the Copperway. [publisher not identified], 1990.