1. References:
2. Al-Ani, S., Arabic Phonology: An Acoustical and Phonological Investigation. The Hague: Mouton publisher, Paris 1979.
3. Alotaibi, A., Pronunciation Problems in the Production of the Voiced Labiodental Fricative /v/ by Saudi speakers of English. Unpublished master’s thesis. Southern Illinois University Carbondale, Carbondale, Illinois, USA 2013.
4. Burquest, D. A., & Payne, D. L., Phonological analysis: A functional Approach. Summer Institute of Linguistics. Dallas, TX, USA 1993.
5. Broselow, E., Chen, S., and Wang, C., The Emergence of the Unmarked in Second Language Phonology. Studies in Second Language Acquisition, 20, 261–80, 1998.