Al-Humaid, A., & Ammar, W. (2008). A Phonetic Study of Najdi Arabic Interferenes in L2 Acquisition of English. Al-Imam Mohammad Ibn Saud Islamic University, College of Langages and Translation, Department of english Language and Literature.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Al-Humaid, Areej, و Wafaa Ammar. A Phonetic Study of Najdi Arabic Interferenes in L2 Acquisition of English. Riyadh: Al-Imam Mohammad Ibn Saud Islamic University, College of Langages and Translation, Department of english Language and Literature, 2008.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Al-Humaid, Areej, و Wafaa Ammar. A Phonetic Study of Najdi Arabic Interferenes in L2 Acquisition of English. Al-Imam Mohammad Ibn Saud Islamic University, College of Langages and Translation, Department of english Language and Literature, 2008.