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