Strong, C.F.
Modern political constitutions: an introduction to the comparative study of their history and existing forms
Sidgwick & Jackson Limited, 1960
 Buku Teks
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
Dahl, Robert A., 1915-2014
Modern political analysis
Prentice Hall of India, 1976
 Buku Teks
Dahl, Robert A., 1915-2014
Modern political analysis
Prentice-Hall, 1978
 Buku Teks
MacIver, Robert M.
The modern state
Oxford, 1926
 Buku Teks