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
Heringa, A.W.
Constitutions compared : an introduction to comparative constitutional law
Metro, 2009
 Buku Teks
Moore, Russell F.
Modern constitutions
Littlefield, Adams, 1957
 Buku Teks
Wheare, K. C.
Modern constitutions
Oxford University Press, 1975
 Buku Teks