Encyclopedia of Africa

2663 Asafa Jalata, State Crises, Globalisation, And National Movements In North-east Africa page 3-4 Encyclopedia of Africa south of the Sahara, page 62

（页面存档备份，存于互联网档案馆）. Marian Aguiar. Anthony Appiah and Henry Louis Gates , 编. Encyclopedia of Africa. Oxford University Press. 2010: 175 [2021-01-24]. ISBN 978-0-19-533770-9

p. 682, ISBN 9780306806407 Appiah, Anthony, Gates, Henry Louis, Encyclopedia of Africa, Volume 1, Oxford University Press (2010), p. 562, ISBN 9780195337709

Republic of." Encyclopedia of Africa, Volume 1. Oxford University Press, 2010 pg.313 R. H. Hughes, J. S. Hughes, G. M. Bernacsek. A Directory of African

Gates. Encyclopedia of Africa. Oxford University Press. 2010: 409. ISBN 978-0-19-533770-9 （英语）.  James Ciment. Encyclopedia of Conflicts Since World War