Gaya APA
Civilisation: test CLE. (2004).
-:
CLE International.
Gaya Chicago
Civilisation: test CLE.
.
-:
CLE International,
2004.
Buku.
Gaya MLA
Civilisation: test CLE.
.
-:
CLE International,
2004.
Buku.
Gaya Turabian
Civilisation: test CLE.
-:
CLE International,
2004.
Buku.