Gaya APA
Pennwell, .
(2003).
Oil & Gas Journal, Catalyst Repot, Comment
(
Week of Oct 6)
.
Houston:
Pennwell Books.
Gaya MLA
Pennwell, .
"Oil & Gas Journal, Catalyst Repot, Comment".
Week of Oct 6
Houston:
Pennwell Books,
2003.
Jurnal TP.