United States. Washington, D.C. Office of the Commercial Counselor. (1993). Information materials on the North American Free Trade Agreement (NAFTA) generalized system of preferences (GSP) multilateral assistance initiative and Intellectual Property Rights (IPR). s.n.
Παραπομπή σε μορφή Chicago (17η εκδ.)United States. Washington, D.C. Office of the Commercial Counselor. Information Materials on the North American Free Trade Agreement (NAFTA) Generalized System of Preferences (GSP) Multilateral Assistance Initiative and Intellectual Property Rights (IPR). [s.l: s.n, 1993.
Παραπομπή σε μορφή MLA (9th εκδ.)United States. Washington, D.C. Office of the Commercial Counselor. Information Materials on the North American Free Trade Agreement (NAFTA) Generalized System of Preferences (GSP) Multilateral Assistance Initiative and Intellectual Property Rights (IPR). s.n, 1993.