APA (7th ed.) Citation

Eastern Montana Symposium Billings, Mont, & Montana Geological Society. (1969). The economic geology of eastern Montana and adjacent areas. [Montana Geological Society].

Chicago Style (17th ed.) Citation

Eastern Montana Symposium Billings, Mont, and Montana Geological Society. The Economic Geology of Eastern Montana and Adjacent Areas. [Billings]: [Montana Geological Society], 1969.

MLA (9th ed.) Citation

Eastern Montana Symposium Billings, Mont, and Montana Geological Society. The Economic Geology of Eastern Montana and Adjacent Areas. [Montana Geological Society], 1969.