Siti Afifah Hashim. (2003). English verb functions: An analytical study based on samples from short stories and academic articles. Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Siti Afifah Hashim. English Verb Functions: An Analytical Study Based on Samples from Short Stories and Academic Articles. Kuala Lumpur: Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2003.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Siti Afifah Hashim. English Verb Functions: An Analytical Study Based on Samples from Short Stories and Academic Articles. Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.