Gaya APA
ROOP, Peter, Roop, Connie.. (2000).
Christopher Columbus .
New York:
Scholastic.
Gaya Chicago
ROOP, Peter, Roop, Connie..
Christopher Columbus.
New York:
Scholastic,
2000.
Text.
Gaya MLA
ROOP, Peter, Roop, Connie..
Christopher Columbus.
New York:
Scholastic,
2000.
Text.
Gaya Turabian
ROOP, Peter, Roop, Connie..
Christopher Columbus.
New York:
Scholastic,
2000.
Print.