Gaya APA
Civil Engineering. (2012).
Surabaya:
Petra Christian Univ..
Gaya Chicago
Civil Engineering.
.
Surabaya:
Petra Christian Univ.,
2012.
Jurnal Internasional.
Gaya MLA
Civil Engineering.
.
Surabaya:
Petra Christian Univ.,
2012.
Jurnal Internasional.
Gaya Turabian
Civil Engineering.
Surabaya:
Petra Christian Univ.,
2012.
Jurnal Internasional.