Gaya APA
Correct english usage. (2008).
New England:
[s.n.].
Gaya Chicago
Correct english usage.
Cet.1.
New England:
[s.n.],
2008.
Text.
Gaya MLA
Correct english usage.
Cet.1.
New England:
[s.n.],
2008.
Text.
Gaya Turabian
Correct english usage.
New England:
[s.n.],
2008.
Print.