Gaya APA
Qader, ., A., S. (1985).
Coal Science and Technology 8 Natural Gas Substitutes from Coal and Oil .
Amsterdam:
Elsevier.
Gaya MLA
Qader, ., A., Shaik.
"Coal Science and Technology 8 Natural Gas Substitutes from Coal and Oil".
Amsterdam:
Elsevier,
1985.
Text.