Lockwood, A. H. (2012). The silent epidemic: Coal and the hidden threat to health. MIT Press.
Cita Chicago (17th ed.)Lockwood, Alan H. The Silent Epidemic: Coal and the Hidden Threat to Health. Cambridge, Mass.: MIT Press, 2012.
Cita MLA (9th ed.)Lockwood, Alan H. The Silent Epidemic: Coal and the Hidden Threat to Health. MIT Press, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.