Perumal, P. (2017). Analyses of training needs of in-service teachers in fostering higher order thinking skills in science teaching (IR).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Perumal, Paramesvary. Analyses of Training Needs of In-service Teachers in Fostering Higher Order Thinking Skills in Science Teaching (IR). 2017.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Perumal, Paramesvary. Analyses of Training Needs of In-service Teachers in Fostering Higher Order Thinking Skills in Science Teaching (IR). 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.