edited by Brian Docherty
Macmillan, 1994
Buku Teks
Berkowitz, Gerald M., author
Longman, 1994
Buku Teks
edited by Alexander Baltzly, A. William Salomone
Appleton-Century-Crofts, 1950
Buku Teks
Woodham, Jonatham M., author
Oxford University Press, 1997
Buku Teks
edited by Jack A. Goldstone, Ted Robert Gurr, Farrokh Moshiri
Westview Press, 1991
Buku Teks