APA-čujuhus (7. p.)
Lankton, L. D. (1997). Beyond the boundaries: Life and landscape at the Lake Superior copper mines, 1840-1875. Oxford University Press.
Chicago-čujuhus (17. p.)
Lankton, Larry D. Beyond the Boundaries: Life and Landscape at the Lake Superior Copper Mines, 1840-1875. New York: Oxford University Press, 1997.
MLA-čujuhus (9. p.)
Lankton, Larry D. Beyond the Boundaries: Life and Landscape at the Lake Superior Copper Mines, 1840-1875. Oxford University Press, 1997.
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