Graham, E. M., & Krugman, P. R. (1989). Foreign direct investment in the United States (2nd ed.). Institute for International Economics.
Lua i Stíl Chicago (17ú heag.)Graham, Edward Montgomery, agus Paul R. Krugman. Foreign Direct Investment in the United States. 2nd ed. Washington, D.C: Institute for International Economics, 1989.
Lua MLA (9ú heag.)Graham, Edward Montgomery, agus Paul R. Krugman. Foreign Direct Investment in the United States. 2nd ed. Institute for International Economics, 1989.
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