Kapetanovic, Jelena. "The Progressive Era, an introduction unit for ELs". OER Commons. Institute for the Study of Knowledge Management in Education, 17 May 2018. Web. 22 Nov. 2024. <https://wlresources.dpi.wi.gov/authoring/376-the-progressive-era-an-introduction-unit-for-els>.
Kapetanovic, J. (2018, May 17). The Progressive Era, an introduction unit for ELs. OER Commons. Retrieved November 22, 2024, from https://wlresources.dpi.wi.gov/authoring/376-the-progressive-era-an-introduction-unit-for-els.