Gaya APA
Sloman, John. (1991).
Economics .
New Jersey:
Prentice Hall.
Gaya Chicago
Sloman, John.
Economics.
New Jersey:
Prentice Hall,
1991.
Text.
Gaya MLA
Sloman, John.
Economics.
New Jersey:
Prentice Hall,
1991.
Text.
Gaya Turabian
Sloman, John.
Economics.
New Jersey:
Prentice Hall,
1991.
Print.