Fiddner, Peter. "Is it a square or a rectangle?". OER Commons. Institute for the Study of Knowledge Management in Education, 12 Feb. 2016. Web. 18 May 2024. <https://oercommons.org/authoring/12077-is-it-a-square-or-a-rectangle>.
Fiddner, P. (2016, February 12). Is it a square or a rectangle?. OER Commons. Retrieved May 18, 2024, from https://oercommons.org/authoring/12077-is-it-a-square-or-a-rectangle.