Lua APA (7ú heag.)
Keil, T. J., & Keil, J. M. (2015). Anthracite's demise and the post-coal economy of Northeastern Pennsylvania. Lehigh University Press.
Lua i Stíl Chicago (17ú heag.)
Keil, Thomas J., agus Jacqueline M. Keil. Anthracite's Demise and the Post-coal Economy of Northeastern Pennsylvania. Bethlehem: Lehigh University Press, 2015.
Lua MLA (9ú heag.)
Keil, Thomas J., agus Jacqueline M. Keil. Anthracite's Demise and the Post-coal Economy of Northeastern Pennsylvania. Lehigh University Press, 2015.
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