Holden, Hillary. "History Day Student Guide". OER Commons. Institute for the Study of Knowledge Management in Education, 05 May 2018. Web. 26 Nov. 2024. <https://oercommons.org/authoring/28554-history-day-student-guide>.
Holden, H. (2018, May 05). History Day Student Guide. OER Commons. Retrieved November 26, 2024, from https://oercommons.org/authoring/28554-history-day-student-guide.