↑Montgomery-Massingberd, Hugh (1980) "Fadhli Sultanate of Zingibar" Burke’s Royal Families of the World: Africa & the Middle East (2. Auflage von Burke’s royal families of the world) Burke’s Peerage, London, Seite 3, ISBN 0-85011-023-8
↑Hertslet's Commercial Treaties 19. Auflage Seite 90
↑Hinchcliffe, Peter; Ducker, John T. and Holt, Maria (2007) Without glory in Arabia: the British retreat from Aden Tauris, London, Seite 299, ISBN 978-1-84511-140-3
↑Hinchcliffe, Peter; Ducker, John T. and Holt, Maria (2007) Without glory in Arabia: the British retreat from Aden Tauris, London, page 89, ISBN 978-1-84511-140-3
↑Hinchcliffe, Peter; Ducker, John T. and Holt, Maria (2007) Without glory in Arabia: the British retreat from Aden Tauris, London, Seiten 89-91, 161, 168, ISBN 978-1-84511-140-3