APA
Hoekman B., Zarrouk Jamel & World Bank. (2009). Changes in cross-border trade costs in the Pan-Arab free tra. Washington: World Bank.
Chicago
Hoekman Bernard, Zarrouk Jamel and World Bank. 2009. Changes in cross-border trade costs in the Pan-Arab free tra. Washington: World Bank.
Harvard
Hoekman B., Zarrouk Jamel and World Bank. (2009). Changes in cross-border trade costs in the Pan-Arab free tra. Washington: World Bank.
MLA
Hoekman Bernard, Zarrouk Jamel and World Bank. Changes in cross-border trade costs in the Pan-Arab free tra. Washington: World Bank. 2009.