Gaya APA
Civil Engineering. (2009).
Surabaya:
Petra Christian Univ..
Gaya Chicago
Civil Engineering.
Vol.11 No.2.
Surabaya:
Petra Christian Univ.,
2009.
Jurnal Internasional.
Gaya MLA
Civil Engineering.
Vol.11 No.2.
Surabaya:
Petra Christian Univ.,
2009.
Jurnal Internasional.
Gaya Turabian
Civil Engineering.
Surabaya:
Petra Christian Univ.,
2009.
Jurnal Internasional.