Buku Teks
Jones, W.T. (William Thomas), 1910-, author
University of California, [Date of publication not identified]
Buku Teks
Bhutto, Benazir, author
Poket Books, 2008
Buku Teks
Schaller, Lyle E., author
Abingdon Press, 1966
Buku Teks
Fife, Bruce, author
Penguin Books, 2004
Buku Teks