Arshad, Sonya, Syed Hasan Abbas Rizvi, Muhammad Faisal Qureshi, Minha Hanif, Imama Iftikhar, Majid Ayoub, and Sanjay Kumar. 2019. “Effectiveness of Laughter Therapy in Cognitive Skills Improvements”. International Journal of Endorsing Health Science Research 7 (1):55-60. https://doi.org/10.29052/IJEHSR.v7.i1.2019.55-60.