Graham, E. M., & Krugman, P. R. (1989). Foreign direct investment in the United States (2nd ed.). Institute for International Economics.
Chicago-referens (17:e uppl.)Graham, Edward Montgomery, och Paul R. Krugman. Foreign Direct Investment in the United States. 2nd ed. Washington, D.C: Institute for International Economics, 1989.
MLA-referens (9:e uppl.)Graham, Edward Montgomery, och Paul R. Krugman. Foreign Direct Investment in the United States. 2nd ed. Institute for International Economics, 1989.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.