GUPTA, R. (2012). ENERGY & ENVIRONMENTAL MANAGEMENT IN METALLURGICAL INDUSTRIES. PHI.
Cita Chicago (17th ed.)GUPTA, R.C. ENERGY & ENVIRONMENTAL MANAGEMENT IN METALLURGICAL INDUSTRIES. N DELHI: PHI, 2012.
Cita MLA (9th ed.)GUPTA, R.C. ENERGY & ENVIRONMENTAL MANAGEMENT IN METALLURGICAL INDUSTRIES. PHI, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.