Warner, Linda. "Astronom". OER Commons. Institute for the Study of Knowledge Management in Education, 07 Nov. 2018. Web. 03 May 2024. <https://oercommons.org/authoring/49826-astronom>.
Warner, L. (2018, November 07). Astronom. OER Commons. Retrieved May 03, 2024, from https://oercommons.org/authoring/49826-astronom.