Lomax, Louis E
Harper & Brothers Publishers, 1962
Buku Teks
Konvitz, Milton R.
Columbia University Press, 1962
Buku Teks
McPherson, James M.
Princeton University press, 1977
Buku Teks
Routledge, 1996
Buku Teks
Taper, Bernard, author
McGraw-Hill, 1962
Buku Teks