Sen, U. (1992). Customs tariff and administration. Vikas publishing house Pvt. Ltd.
Čikaški stil citiranjaSen, U.K. Customs Tariff and Administration. New Delhi: Vikas publishing house Pvt. Ltd, 1992.
MLA način citiranjaSen, U.K. Customs Tariff and Administration. Vikas publishing house Pvt. Ltd, 1992.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.