Landecker, M. (1968). The President and public opinion: Leadership in foreign affairs. Public Affairs Press.
Lua i Stíl Chicago (17ú heag.)Landecker, Manfred. The President and Public Opinion: Leadership in Foreign Affairs. Washington: Public Affairs Press, 1968.
Lua MLA (9ú heag.)Landecker, Manfred. The President and Public Opinion: Leadership in Foreign Affairs. Public Affairs Press, 1968.
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