Strong, C.F.
Modern political constitutions: an introduction to the comparative study of their history and existing forms
Sidgwick & Jackson Limited, 1960
 Buku Teks SO
Strong, C.F.
Konstitusi-Konstitusi politik Modern: Kajian Tentang Sejarah dan Bentuk-bentuk Konstitusi Dunia: An introduction to the comparative study of their history and existing form
Nuansa, 2004
 Buku Teks
Reinsch, Paul S.
The fundamental principles of government / Paul S. Reinsch.
Commercial Press, 1921
 Buku Teks SO
Roucek, Joseph S.
Introduction to political science
Thomas Y. Crowell, 1950
 Buku Teks
Introduction to political science
by Carlton Clymer Rodee ... [and others]
McGraw-Hill Kogakusha, 1976
 Buku Teks SO