Promoting Positive Youth Development Lessons from the 4-H Study / / edited by Edmond P. Bowers, G. John Geldhof, Sara K. Johnson, Lacey J. Hilliard, Rachel M. Hershberg, Jacqueline V. Lerner, Richard M. Lerner. // Springer eBooks. URL: http://dx.doi.org/10.1007/978-3-319-17166-1