Ferguson, John H., author
McGraw-Hill, 1981
Buku Teks
Wilson, James Q., author
D.C. Heath, 1995
Buku Teks
Wilson, James Q., author
D.C. Helath and Co., 1986
Buku Teks
Ferguson, John H., author
McGraw-Hill, 1965
Buku Teks
Woll, Peter, author
Little, Brown, 1965
Buku Teks