Hughes، R. H.؛ Hughes, J. S. (1992). "4B. The Gueltas of the Tassili n'Ajjer". A directory of African wetlands : with a chapter on Madagascar. Glan [u.a.]: IUCN [u.a.] ص. 25–27. ISBN:2880329493. اطلع عليه بتاريخ 2013-05-28.
Hughes، R. H.؛ Hughes, J. S. (1992). "4B. The Gueltas of the Tassili n'Ajjer". A directory of African wetlands : with a chapter on Madagascar. Glan [u.a.]: IUCN [u.a.] ص. 25–27. ISBN:2880329493. اطلع عليه بتاريخ 2013-05-28.Hughes, R. H.; Hughes, J. S. (1992). "4B.