Kreitmayer, Stefan. "How to design a questionnairetest". OER Commons. Institute for the Study of Knowledge Management in Education, 16 Nov. 2018. Web. 03 May 2024. <https://oercommons.org/authoring/49373-how-to-design-a-questionnairetest>.
Kreitmayer, S. (2018, November 16). How to design a questionnairetest. OER Commons. Retrieved May 03, 2024, from https://oercommons.org/authoring/49373-how-to-design-a-questionnairetest.