Lloyd, P.C
Africa in social change : west African societies in transition / P.C. Lloyd
Frederick A. Praeger, 1968
 Buku Teks
Kitzinger, Uwe W.
German electoral politics, a study of the 1957 campaign
Clarendon Press, 1960
 Buku Teks
Nye, Russel B.
Midwestern progressive politics : a historical study of its origins and development 1870-1958 / Russel B. Nye
Michigan State University Press, 1959
 Buku Teks
Dodge, Dorothy
African politics in perspective
D. Van Nostrand, 1966
 Buku Teks
A Mandate for democracy : three decades of the Federal Republic of Germany.
Federal Republic of Germany,, 1980
 Buku Teks