SpringerLink (Online service), Bowers, E. P., Geldhof, G. J., Johnson, S. K., Hilliard, L. J., Hershberg, R. M., . . . Lerner, R. M. (2015). Promoting Positive Youth Development: Lessons from the 4-H Study. Springer International Publishing : Imprint: Springer.
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Edmond P. Bowers, G. John Geldhof, Sara K. Johnson, Lacey J. Hilliard, Rachel M. Hershberg, Jacqueline V. Lerner, και Richard M. Lerner. Promoting Positive Youth Development: Lessons from the 4-H Study. Cham: Springer International Publishing : Imprint: Springer, 2015.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Promoting Positive Youth Development: Lessons from the 4-H Study. Springer International Publishing : Imprint: Springer, 2015.
