एपीए उद्धरण

Sen, U. (1992). Customs tariff and administration. Vikas publishing house Pvt. Ltd.

शिकागो स्टाइल उद्धरण

Sen, U.K. Customs Tariff and Administration. New Delhi: Vikas publishing house Pvt. Ltd, 1992.

एमएलए उद्धरण

Sen, U.K. Customs Tariff and Administration. Vikas publishing house Pvt. Ltd, 1992.