Gaya APA
Christopher Columbus. (2000).
New York:
[s.n.].
Gaya Chicago
Christopher Columbus.
Cet.2.
New York:
[s.n.],
2000.
Text.
Gaya MLA
Christopher Columbus.
Cet.2.
New York:
[s.n.],
2000.
Text.
Gaya Turabian
Christopher Columbus.
New York:
[s.n.],
2000.
Print.