Gaya APA
Attia, Y, A. (1985).
Coal Science and Technology 9 : Processing and Utilization of High Sulfur Coal .
Amsterdam:
Elsevier.
Gaya MLA
Attia, Yosep, A..
"Coal Science and Technology 9 : Processing and Utilization of High Sulfur Coal".
Amsterdam:
Elsevier,
1985.
Text.