Gaya APA
Helpman, Elhanan. (1992).
Trade Policy and Market Structure .
Cambridge:
.
Gaya Chicago
Helpman, Elhanan.
Trade Policy and Market Structure.
Cambridge:
,
1992.
Text.
Gaya MLA
Helpman, Elhanan.
Trade Policy and Market Structure.
Cambridge:
,
1992.
Text.
Gaya Turabian
Helpman, Elhanan.
Trade Policy and Market Structure.
Cambridge:
,
1992.
Print.