Gaya APA
CETLJOURNAL 2013. (2013).
:
www.cetljournal.co.uk.
Gaya Chicago
CETLJOURNAL 2013.
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www.cetljournal.co.uk,
2013.
Jurnal Internasional.
Gaya MLA
CETLJOURNAL 2013.
.
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www.cetljournal.co.uk,
2013.
Jurnal Internasional.
Gaya Turabian
CETLJOURNAL 2013.
:
www.cetljournal.co.uk,
2013.
Jurnal Internasional.