Sen, U. (1992). Customs tariff and administration. Vikas publishing house Pvt. Ltd.
Chicago Edition CitationSen, U.K. Customs Tariff and Administration. New Delhi: Vikas publishing house Pvt. Ltd, 1992.
MLA Edition CitationSen, U.K. Customs Tariff and Administration. Vikas publishing house Pvt. Ltd, 1992.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.