Gaya APA
Pennwell, .
(2003).
Oil & Gas Journal, Underbalanced Drilling
(
Week of Dec 1)
.
Houston:
Pennwell Books.
Gaya MLA
Pennwell, .
"Oil & Gas Journal, Underbalanced Drilling".
Week of Dec 1
Houston:
Pennwell Books,
2003.
Jurnal TP.