- 
                                    . (2008, April). A Report by Civic Enterprises in association with Peter D. Hart Research Associates for the National Conference on Citizenship. 
- 
                                    . (March 2013). Richards, Maryse & Cornelli Sanderson, Rebecca & Celio, Christine & Grant, Jane & Choi, Inhe & George, Christine & Deane, Kyle. Journal of Experiential Education. Vol 36, Issue 1. 5-21. 
- 
                                    . (2002). Billig, Shelley. 
- 
                                    . National Youth Leadership Council. Revised edition: 2021. 
- 
                                    . (Jan. 2016) Kunkel, Christine D. Critical Questions in Education, vol. 7, no. 2, pp. 146–167. 
- 
                                    . (Feb. 2018) Farber, Katy, and Penny Bishop. Research in Middle Level Education Online, vol. 41, no. 2, pp. 1–15. EBSCOhost, doi:10.1080/19404476.2017.1415600. 
- 
                                    . (Mar. 2017). Scogin, Stephen C., et al. Journal of Experiential Education, vol. 40, no. 1, pp. 39–57. EBSCOhost, search.ebscohost.com/login.aspx?direct=true&db=eric&AN=EJ1129193&site=ehost-live. 
- 
                                    . (2017). Katherine A. Farber. Current Issues in Middle Level Education 22 (1), 1-9. 
- 
                                    (Winter 2021). Merritt, Eileen, Tracy Harkins, and Sara Rimm-Kaufman. CLEARING: The journal of community-based environmental literacy education. 
- 
                                    . (2021). Grossman, Jean, and Nancy Duchesneau. Solutions for Educational Equity through Social and Emotional Well-Being. MDRC. 
- 
                                    (2021). Rimm-Kaufman, Sara E., et al. Journal of Applied Developmental Psychology 74. 
- 
                                    (2017). Stallworth-Clark, Rosemarie. Journal of Education & Social Justice. 5.1. 81-93. 
- 
                                    (2020). Lucman, Sharehann T. The Councilor: A Journal of the Social Studies. Vol. 81: No. 2, Article 2. 

 
     
     
    