Prianso
Peranan pembangunan jalan kereta api Union Pacific dalam pembukaan wilayah barat Amerika 1862-1869
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2003
 UI - Skripsi (Membership)
White, James J.
Uniform commercial code / by James J. White and Robert S. Summers
West Group, 1995
 Buku Teks
Davis, Joel, 1950-
Advertising research : theory and practice / Joel J. Davis
Prentice-Hall, 1997
 Buku Teks
Modelski, George
A theory of foreign policy
Frederick A. Praeger, 1962
 Buku Teks
DeLisi, Matt
American corrections : theory, research, policy and practice
Jones and Barlett Publishers, 2010
 Buku Teks