Bullard, Reader
Oxford university Press, 1958
Buku Teks
edited by Shireen Hunter ; foreword by Robert G. Neumann and G. Henry M. Schuler
Westview Press, 1985
Buku Teks
Frank, Helmut J.
Frederick A. Praeger, 1966
Buku Teks
editor, Avraham Sela
Continuum, 2002
Buku Referensi
S l. Exxon Corporation 1980,
Buku Teks