Cita APA (7a ed.)
Beard, J. T. Mine Gases and Ventilation: Textbook for Students of Mining, Mining Engineers and Candidates Preparing for Mining Examinations (2a edición.). McGraw-Hill.
Cita estilo Chicago (17a ed.)
Beard, James T. Mine Gases and Ventilation: Textbook for Students of Mining, Mining Engineers and Candidates Preparing for Mining Examinations. 2a edición. Nueva York, EUA: McGraw-Hill.
Cita MLA (9a ed.)
Beard, James T. Mine Gases and Ventilation: Textbook for Students of Mining, Mining Engineers and Candidates Preparing for Mining Examinations. 2a edición. McGraw-Hill.
Precaución: Estas citas no son 100% exactas.