Zhang, J., and R. Lynch. “The Relationship Between Primary 5 and 6 Students’ Perceptions of Parental Encouragement and Their Academic Achievement in Mandarin Learning at An International School, Bangkok”. Scholar: Human Sciences, vol. 9, no. 2, Jan. 2018, p. 243, http://www.assumptionjournal.au.edu/index.php/Scholar/article/view/3000.