Brace, N., C. Doran, J. Pembery, E. Fitzpatrick, and R. Herman. “Assessing Time Knowledge in Children Aged 10 to 11 Years”. International Journal of Assessment Tools in Education, Vol. 6, no. 4, Nov. 2019, pp. 580-91, http://ijate.net/index.php/ijate/article/view/786.