Gaya APA
Civil Engineering. (2011).
Jakarta:
Petra Christian Univ..
Gaya Chicago
Civil Engineering.
Vol.13 No.1.
Jakarta:
Petra Christian Univ.,
2011.
Jurnal Internasional.
Gaya MLA
Civil Engineering.
Vol.13 No.1.
Jakarta:
Petra Christian Univ.,
2011.
Jurnal Internasional.
Gaya Turabian
Civil Engineering.
Jakarta:
Petra Christian Univ.,
2011.
Jurnal Internasional.