Lin, Rachel. "Documenting your ecological footprint". OER Commons. Institute for the Study of Knowledge Management in Education, 19 Jul. 2016. Web. 03 Nov. 2024. <https://oercommons.org/authoring/14949-documenting-your-ecological-footprint>.
Lin, R. (2016, July 19). Documenting your ecological footprint. OER Commons. Retrieved November 03, 2024, from https://oercommons.org/authoring/14949-documenting-your-ecological-footprint.