Pilger, John
The new rulers of the world
Vereso, 2002
Buku Teks
100 (one hundred) great kings, queens and rulers of the world
edited by John Canning
Taplinger, 1967
Buku Referensi
Luo, Guanzhong
Three kingdoms
Foreign Language Press, 2000
Buku Teks
Davidson, Basil
African kingdoms
Time-Life International, 1967
Buku Teks
Ballard, G.A.
Rulers of the Indian Ocean with ills., and map
London Duckworth 1927
Buku Teks