Siti Ruhana Suref. (2017). A needs analysis of the speaking skills of enforcement officers at a local public agency.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Siti Ruhana Suref. A Needs Analysis of the Speaking Skills of Enforcement Officers at a Local Public Agency. 2017.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Siti Ruhana Suref. A Needs Analysis of the Speaking Skills of Enforcement Officers at a Local Public Agency. 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.