Tehranian, Majid
Lynn Rienner, 1999
Buku Teks
edited by Alf Hornborg and Carole L. Crumley
Left Coast Press, 2007
Buku Teks
Organski, A.F.K.
Alfred A. Knopf, 1969
Buku Teks
Macmillan, 1991
Buku Referensi
James E Davis, colsultan
Graphic Learning,, 1978
Buku Referensi