Peck, Carla, and Peter Seixas. “Benchmarks of Historical Thinking: First Steps”. Canadian Journal of Education Revue Canadienne De l’éducation, vol. 31, no. 4, Dec. 2008, p. 1015‐1038, https://journals.sfu.ca/cje/index.php/cje-rce/article/view/3030.