Fernando, W., P.Waidyarathne, K. ., & M.Jayasundara, D. (2020). Proper Data Analysis Techniques to Reduce Experimental Error in Longitudinal Data. International Journal of Sciences: Basic and Applied Research (IJSBAR), 54(4), 273–288. Retrieved from https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/11934