1. Ababneh, Yahya, 2015. “The Phonetic Grading Based on Priority in the Studies of Arab Scholars” Journal for Arabs Union of Arts. Vol. 22, No. 2, p. p 415-446.
2. Al-hjouj, Abdullah, 2016 “On the Phonological and Orthographic Developments Affricates in English”. Taiwan Journal of Linguistics. vol. 4, 2, p. p 105-132.
3. Al-Arayfi & Ibrahim M. Khalil, 2015. “Articulation Disorders in pronouncing [ʃ] and [ʤ] in Arabic”. Studies in Social and Human Sciences. vol. 42, No. 1, p. p 1041-1051.
4. Ali, Abdullah, 2001.The Meaning of the Holy Quran. Maryland: Amana P.
5. Al-Fozan, Abdulrahman, 1989.Assimilation in Classical Arabic: A Phonological Study. University of Glasgow: Unpublished Ph.D. Dissertation.