Aden, H. B. (2019). Cross-linguistic influence: Djiboutian francophones' awareness of English linguistic features. Department of English Language and Literature, Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Aden, Harbi Barkad. Cross-linguistic Influence: Djiboutian Francophones' Awareness of English Linguistic Features. Kuala Lumpur: Department of English Language and Literature, Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2019.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Aden, Harbi Barkad. Cross-linguistic Influence: Djiboutian Francophones' Awareness of English Linguistic Features. Department of English Language and Literature, Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2019.