Corwin, Edward S., author
The President : office and powers, 1787-1984 : history and analysis of practice and opinion
New York University Press, 1957
 Buku Teks
Duetsch, Karl W.
Germany rejoins the powers Mass opinion, interest groups, and elites in contemporary German foreign policy / Karl W. Duetsch
Stanford University Press, 1959
 Buku Teks
García-Villegas, Mauricio, author
The Powers of Law: A Comparative Analysis of Sociopolitical Legal Studies
Cambridge University Press, 2018
 eBooks
Sonquist, John A., author
Survey and opinion research: procedures for processing and analysis
Prentice-Hall, 1977
 Buku Teks
Myung, Hyun Cho, author
Korea and the major powers : an analysis of power structures in East Asia
Seoul Computer Press, 1989
 Buku Teks
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