Copeland, B. (1986). Tariffs and quotas: Retaliation and negotiation with two instruments of protection. Department of Economics, University of British Columbia.
Citazione stile Chigago Style (17a edizione)Copeland, Brian. Tariffs and Quotas: Retaliation and Negotiation with Two Instruments of Protection. Vancouver, Canada: Department of Economics, University of British Columbia, 1986.
Citatione MLA (9a ed.)Copeland, Brian. Tariffs and Quotas: Retaliation and Negotiation with Two Instruments of Protection. Department of Economics, University of British Columbia, 1986.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.