PERKINS, D. (1955). The American Approach to Foreign Policy. Harvard University Press.
Lua i Stíl Chicago (17ú heag.)PERKINS, Dexter. The American Approach to Foreign Policy. Harvard University Press, 1955.
Lua MLA (8ú heag.)PERKINS, Dexter. The American Approach to Foreign Policy. Harvard University Press, 1955.
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