Gaya APA
A Geometric Approach to International Trade. (1979).
New York:
.
Gaya Chicago
A Geometric Approach to International Trade.
.
New York:
,
1979.
.
Gaya MLA
A Geometric Approach to International Trade.
.
New York:
,
1979.
.
Gaya Turabian
A Geometric Approach to International Trade.
New York:
,
1979.
.