Gaya APA
PEN,Jan. (1967).
A Primer On International Trade .
New York:
Random House.
Gaya Chicago
PEN,Jan.
A Primer On International Trade.
New York:
Random House,
1967.
Teks.
Gaya MLA
PEN,Jan.
A Primer On International Trade.
New York:
Random House,
1967.
Teks.
Gaya Turabian
PEN,Jan.
A Primer On International Trade.
New York:
Random House,
1967.
Teks.