Zarett, Nicole, Kristen Fay, Yibing Li, Jennifer Carrano, Erin Phelps, and Richard M. Lerner. 2009. “More Than Child’s Play: Variable-and Pattern-Centered Approaches for Examining Effects of Sports Participation on Youth Development”. Developmental Psychology 45 (2): 368–382. doi:10.1037/a0014577.
A Searchable Database of Research about the 4-H Program