* Heath, Jeffrey "Ablaut and Ambiguity: Phonology of a Moroccan Arabic Dialect" (Albany: State University of New York Press, 1987)* Holes, Clive (2004) "Modern Arabic: Structures, Functions, and Varieties" Georgetown University Press.
* Heath, Jeffrey «Ablaut and Ambiguity: Phonology of a Moroccan Arabic Dialect» (Albany: State University of New York Press, 1987)* Holes, Clive (2004) "Modern Arabic: Structures, Functions, and Varieties" Georgetown University Press.