Sullivan, Thomas J., 1944-
John Wiley & Sons, 1984
Buku Teks
Harvey, Lee
Macmillan, 1993
Buku Teks
Schrag, Clarence C.
Harper & Row, 1963
Buku Teks
Zanden, James W. Vander
John Wiley & Sons, 1979
Buku Teks
Ogburn, William F.
Houghton Mifflin, 1946
Buku Teks