APA aipamena

Copeland, B. (1986). Tariffs and quotas: Retaliation and negotiation with two instruments of protection. Department of Economics, University of British Columbia.

Chicago Style aipamena

Copeland, Brian. Tariffs and Quotas: Retaliation and Negotiation with Two Instruments of Protection. Vancouver, Canada: Department of Economics, University of British Columbia, 1986.

MLA aipamena

Copeland, Brian. Tariffs and Quotas: Retaliation and Negotiation with Two Instruments of Protection. Department of Economics, University of British Columbia, 1986.