Al-Qannas, B. A., & Al-Mahmoud, M. (2012). Linguistic politeness: Exploring the requesting behavior of Saudi learners of English. Al-Imam Muhammad Ibn Saud Islamic University, College of Languages and Translation, Department of English Language and Literature.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Al-Qannas, Basemah Abdullah, و Mahmoud Al-Mahmoud. Linguistic Politeness: Exploring the Requesting Behavior of Saudi Learners of English. Riyadh: Al-Imam Muhammad Ibn Saud Islamic University, College of Languages and Translation, Department of English Language and Literature, 2012.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Al-Qannas, Basemah Abdullah, و Mahmoud Al-Mahmoud. Linguistic Politeness: Exploring the Requesting Behavior of Saudi Learners of English. Al-Imam Muhammad Ibn Saud Islamic University, College of Languages and Translation, Department of English Language and Literature, 2012.