Ramsey, B. (1997). 100 years of coal mining: The Elk River Valley : a regional community project, 1898-1998. Ramsey Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRamsey, Bruce. 100 Years of Coal Mining: The Elk River Valley : A Regional Community Project, 1898-1998. [Sparwood, B.C.]: Ramsey Publications, 1997.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRamsey, Bruce. 100 Years of Coal Mining: The Elk River Valley : A Regional Community Project, 1898-1998. Ramsey Publications, 1997.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.