Butler, Walter. "The Big6: A Research Process". OER Commons. Institute for the Study of Knowledge Management in Education, 22 Mar. 2017. Web. 27 Dec. 2024. <https://oercommons.org/authoring/21084-the-big6-a-research-process>.
Butler, W. (2017, March 22). The Big6: A Research Process. OER Commons. Retrieved December 27, 2024, from https://oercommons.org/authoring/21084-the-big6-a-research-process.