Gaya APA
JAG.J.SINGH, . (1980).
ENVIRONMENTAL AND CLIMATIC IMPACT OF COAL UTILIZATION .
United State of America:
ACADEMIC PRESS.
Gaya MLA
JAG.J.SINGH, .
"ENVIRONMENTAL AND CLIMATIC IMPACT OF COAL UTILIZATION".
United State of America:
ACADEMIC PRESS,
1980.
Textbook.