Nau, Henry R., 1941-, author
SAGE Publications, 2019
Buku Teks
edited by Arend Lijphart
Allyn and Bacon, 1966
Buku Teks
Friedmann, Wolfgang, 1907-1972, author
Macmillan, 1951
Buku Teks
Roskin, Michael G., author
Pearson/Prentice Hall, 2004
Buku Teks
Nye, Joseph S., author
Yayasan Obor Indonesia , 1992
Buku Teks