Al-Ani, S. (1970). Arabic phonology. The Hague: Mouton.
Alghamdi, M. (1998). A spectrographic analysis of Arabic vowels: A cross-dialectal study. Journal of King Saud University, 10(1), 3-24.
Boersma, P., & Weenink, D. (2008). Praat: Doing phonetics by computer (Version 5.0.34). Retrieved September 22, 2008, from http://www.praat.org/.
Cox, F., & Palethorpe, S. (2005). A preliminary acoustic phonetic examination of Lebanese Australian English. Paper presented at the Australian Language and Speech Conference, Sydney, Australia. Retrieved March 4, 2009 from http://clas.mq.edu.au/felicity/Papers/ Cox%26PaleL%26S05FnalBW.pdf.
Deterding, D. (1997). The formants of monophthongs vowels in Standard British English pronunciation. Journal of International Phonetics Association, 27(1-2), 47-55.
Fabricuis, A. (2007). Vowel formants and angle measurements in diachronic sociophonetic studies: Foot-fronting in RP. In J. Trouvain, & W. Barry (Eds.), Proceedings of the 16th International Congress of Phonetic Sciences (ICPhS XVI), held on 6-10 August 2007 in Saarbrücken, Germany (pp. 1477-1480).
Ferragne, E., & Pellegrino, F. (2010). Formant frequencies of vowels in 13 accents of the British Isles. Journal of the International Phonetic Association, 40(1), 1-34.
Flege, J. E. (1995). Second Language speech learning: Theory, findings and problems. In
W. Strange (Ed.), Speech perception and linguistic experience: Issue in crosslanguage research (pp. 229-273). Timonium: York Press. Retrieved February 6, 2009 from http://jimflege.com/files/ Flege_in_Strange_1995.pdf.
Flege, J. E., MacKay, I. R. & Meador, D. (1999). Native Italian speakers’ perception and production of English vowels. Journal of the Acoustical Society of America, 106, 2973-2987.
Flege, J., & Port, R. (1981). Cross-language phonetic interference: Arabic to English. Language and Speech, 24, 125-146.
Flemming, E., & Johnson, S. (2007). Rosa's roses: Reduced vowels in American English, Journal of the International Phonetic Association, 37, 83-96.
Hawkins, S., & Midgley, J. (2005). Formants frequencies of RP monophthongs in four age groups of speakers. Journal of The International Phonetic Association, 35(2), 183-199.
Hillenbrand, J., Getty, L. A., Clark, M. J., & Wheeler, K. (1995). Acoustic characteristics of American English vowels. Journal of the Acoustical Society of America, 97, 3099-3111.
Holes, C. (1990). Gulf Arabic. New York: Routledge.
Hubais, A. M. F. (2009). An instrumental analysis of English Vowels Produced by Omani Speakers. Unpublished master’s research report, University of Malaya, Kuala Lumpur, Malaysia.
Kotby M. N., Saleh M., Hegazi M., Gamal N., Abdel Salam M., Nabil A., & Fahmi S. (2011). The Arabic vowels: Features and possible clinical application in communication disorders. Folia Phoniatr Logop, 201(63), 171-177.
Maxwell, O., & Fletcher, J. (2009). Acoustic and durational properties of Indian English vowels. World Englishes, 28(1), 52-69.
Mitchell, T. F. (1993). Pronouncing Arabic. Oxford: Oxford University Press.
Mitleb, F. (1981). Timing of English vowels spoken with an Arabic accent. Research in Phonetics, 2, 193-226.
Munro, M. J. (1993). Production of English vowels by native speakers of Arabic: Accent measurements and accentedness ratings. Language & Speech, 36(1), 39-66.
Mutonya, M. (2008). African Englishes: Acoustic analysis of vowels. World Englishes, 27(3/4), 434-449.
Newman, D. (2002). The phonetic status of Arabic within the world's languages: The uniqueness of the lughat al-daad. Antwerp Papers in Linguistics, 100, 65-75.
Newman, D. L., & Verhoeven, J. (2002). Frequency analysis of Arabic vowels in connected speech. Antwerp Papers in Linguistics, 100, 77-86.
Norlin, K. (1984). Acoustic analysis of vowels and diphthongs in Cairo Arabic. Lund University Working Papers, 27, 185-207.
Pillai, S., Mohd. Don, Z., Knowles, G., & Tang, J. (2010). Malaysian English: an instrumental analysis of vowel contrasts. World Englishes, 28(1), 159–172.
Rasmussen, Z. B. (2007). The interlanguage speech intelligibility benefit: Arabicaccented English. Unpublished senior honours thesis. Utah: University of Utah. Retrieved March 6, 2009, from http://www.linguistics.utah.edu/speechlab/Rasmussen%202007.pdf.
Salbrina Haji Sharbawi. (2006). The vowels of Brunei English. English World-Wide, 27(3), 247-264.
Watt, D., & Tillotson, J. (2001). A spectrographic analysis of vowel fronting in Bradford English. English World-Wide, 22(2), 269-302.
Yan, Q., & Vaseghi, S. (2003). Analysis, modeling and synthesis of formants of British, American and Australian accents. Proceedings of the Institute of Electrical and Electronics Engineers Conference on Acoustics, Speech and Signal Processing, 712-755.