Ferguson, John H., author
McGraw-Hill, 1947
Buku Teks
Ferguson, John H., author
McGraw-Hill, 1981
Buku Teks
Ferguson, John H., author
McGraw-Hill, 1981
Buku Teks
Tucker, William P.
University of Minnesota Press, 1958
Buku Teks
Wilson, James Q., author
D.C. Heath, 1995
Buku Teks