Graber, Mark A.
A new introduction to American constitutionalism
Oxford University Press, 2015
 Buku Teks
From the declaration of independence to the constitution : the roots of american constitutionalism
edited by Carl J. Friedrich, Robert G. McCloskey
The Liberal Arts Press, 1954
 Buku Teks
Bryson, George D.
American management abroad : a hanbook for the business executive overseas / George D. Bryson
Harper & Brothers, 1961
 Buku Teks
Bryson, George D.
Profits from abroad : a reveille for American business / George D. Bryson
McGraw-Hill , 1964
 Buku Teks
Andrews, William G.
Constitutions and constitutionalism
D.van Nostrand Company,Inc., 1968
 Buku Teks