Gaya APA
Whuler, James O., Muller, Peter O.. (1981).
Economic geography .
New York:
John Wiley.
Gaya Chicago
Whuler, James O., Muller, Peter O..
Economic geography.
New York:
John Wiley,
1981.
Text.
Gaya MLA
Whuler, James O., Muller, Peter O..
Economic geography.
New York:
John Wiley,
1981.
Text.
Gaya Turabian
Whuler, James O., Muller, Peter O..
Economic geography.
New York:
John Wiley,
1981.
Print.