Gaya APA
Civil Engineering. (2010).
Jakarta:
Petra Christian Univ..
Gaya Chicago
Civil Engineering.
Vol.12 No.2.
Jakarta:
Petra Christian Univ.,
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Jurnal Internasional.
Gaya MLA
Civil Engineering.
Vol.12 No.2.
Jakarta:
Petra Christian Univ.,
2010.
Jurnal Internasional.
Gaya Turabian
Civil Engineering.
Jakarta:
Petra Christian Univ.,
2010.
Jurnal Internasional.