Cita APA (7a ed.)
Kneeland, F. H. Practical Coal Production: Getting out the Coal. McGraw-Hill.
Cita estilo Chicago (17a ed.)
Kneeland, Frank H. Practical Coal Production: Getting Out the Coal. Nueva York, EUA: McGraw-Hill.
Cita MLA (9a ed.)
Kneeland, Frank H. Practical Coal Production: Getting Out the Coal. McGraw-Hill.
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