Berg, R. B. (1974). Building stone in Montana. Montana College of Mineral Science and Technology : for sale by Montana Bureau of Mines and Geology.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBerg, Richard B. Building Stone in Montana. Butte: Montana College of Mineral Science and Technology : for sale by Montana Bureau of Mines and Geology, 1974.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBerg, Richard B. Building Stone in Montana. Montana College of Mineral Science and Technology : for sale by Montana Bureau of Mines and Geology, 1974.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.