Geethanjali Narayanan. (1999). Reliability of the English placement test at the PPP Training Centre, Mara Institute of Technology: A case-study of four low proficiency ESL learners.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Geethanjali Narayanan. Reliability of the English Placement Test at the PPP Training Centre, Mara Institute of Technology: A Case-study of Four Low Proficiency ESL Learners. 1999.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Geethanjali Narayanan. Reliability of the English Placement Test at the PPP Training Centre, Mara Institute of Technology: A Case-study of Four Low Proficiency ESL Learners. 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.