Magstadt, Thomas M., author
Wadsworth-Cengage learning, 2009
Buku Teks
Brady, Alexander, author
University of Toronto Press, 1948
Buku Teks
Wilson, James Q., author
D.C. Heath, 1995
Buku Teks
Wilson, James Q., author
D.C. Helath and Co., 1986
Buku Teks
Aitkin, Don, author
Pitman, 1985
Buku Teks