1. Archer, T. M., Warner, P. D, Miller, W., Clark, C. D, James, S., Cummings, S. R., & Adamu, U. (2007). Can we define and measure excellence in Extension? Journal of Extension 45(1), Article 1COM1. Retrieved from http://joe.org/joe/2007february/comm1.php
2. Arnold, M. E. (2015). The Oregon 4-H program model: Supporting the development of thriving youth. Corvallis, OR: Oregon State University. Retrieved from http://oregon.4h.oregonstate.edu/sites/default/files/about/pyd/2015_pqa_task_force_program_model_presentation.pdf
3. Arnold, M. E. (2018). From context to outcomes: A thriving model for 4-H youth development programs. Journal of Human Sciences and Extension, 6(1), 141–160. Retrieved from https://www.jhseonline.com/article/view/653
4. Baker, B., Calvert, M., Emery, M., Enfield, R., & Williams, B. (2010). Mapping the impact of youth on community development: What are we learning? Retrieved from http://ncrcrd.msu.edu/uploads/files/Mapping%20Impact%20of%20Youth%20on%20Com%20Dev%2012-3-10.pdf
5. Baker, B., & Gill, P. (2015). Ripple effects mapping, Parts 1-4 [Video files]. UMaine Cooperative Extension YouTube. Retrieved from http://ucanr.edu/sites/Social_Capital _Multi-State/Tools_for_Engagement_-_Evaluation/