“Africa - 手話”. LibGuides. Gallaudet University Library (2012年3月7日). 2012年5月21日閲覧。
nou-la.org
For a classification, {(Citation | last = Wittmann | first = Henri | year = 1991 | title = Classification linguistique des langues signées non vocalement | language = fr | trans-title = Linguistic classification of non vocally signed languages | journal = Revue québécoise de linguistique théorique et appliquée |volume = 10 | number = 1 | page = 215–88 | url = http://www.nou-la.org/ling/1991a-class.pdf | format = PDF}).