1. About Quizlet (2022). Quizlet. Retrieved August 20, 2022, from https://quizlet.com/mission
2. Arnold, K. M., & McDermott, K. B. (2013). Test-potentiated learning: distinguishing between direct and indirect effects of tests. Journal of Experimental Psychology: Learning Memory and Cognition, 39(3), 940.
3. Ascher, A., & Saslow, J. (2022). (n.d.). Top Notch | Online Placement Test—All Levels (24 months). Pearson ERPI. Retrieved September 1, from https://www.pearsonerpi.com/en/elt/integrated-skills/top-notch-online-placement-test-all-levels-24-months-9780132470308
4. Ataş, U. (2018). The Role of Receptive Vocabulary Knowledge in Advanced EFL Listening Comprehension. TESL-EJ, 21(4).
5. Baddeley, A. (2003). Working memory: looking back and looking forward. Nature Reviews Neuroscience, 4(10), 829–839.