Wilson, James Q., author
D.C. Heath, 1995
Buku Teks
Wilson, James Q., author
D.C. Helath and Co., 1986
Buku Teks
Griffith, Ernest
Frederick A. Praeger, 1954
Buku Teks
Hamilton, Charles V.
Scott, Foresman, 1982
Buku Teks
by Robert M. Bigler ... [and others]
Kendall/Hunt, 1982
Buku Teks