Sen, U. (1992). Customs tariff and administration. Vikas publishing house Pvt. Ltd.
Stile di citazione ChicagoSen, U.K. Customs Tariff and Administration. New Delhi: Vikas publishing house Pvt. Ltd, 1992.
Citazione MLASen, U.K. Customs Tariff and Administration. Vikas publishing house Pvt. Ltd, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.