Ruzlina Muhammad Yusof. (1994). Overall English language proficiency at form five level as measured by cloze. Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ruzlina Muhammad Yusof. Overall English Language Proficiency at Form Five Level as Measured by Cloze. Bangi: Universiti Kebangsaan Malaysia, 1994.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ruzlina Muhammad Yusof. Overall English Language Proficiency at Form Five Level as Measured by Cloze. Universiti Kebangsaan Malaysia, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.