1. Administration for Community Living. (2021). 2020 Profile of Older Americans. https://acl.gov/sites/default/files/Profile%20of%20OA/2020ProfileOlderAmericans_RevisedFinal.pdf
2. Retrospective pretest: A practical technique for professional development evaluation;Allen J. M.;Journal of Industrial Teacher Education,2007
3. American Geriatrics Society. (2024). Why Geriatrics. https://www.americangeriatrics.org/geriatrics-profession/why-geriatrics
4. Bjorklund, B. R. (2014). The journey of adulthood (8th ed.). Pearson.
5. Effect Size Guidelines, Sample Size Calculations, and Statistical Power in Gerontology