ebrary, Inc, Silbereisen, R. K., & Lerner, R. M. (2007). Approaches to positive youth development. Sage Publications.
Chicago-čujuhus (17. p.)ebrary, Inc, R. K. Silbereisen, juo Richard M. Lerner. Approaches to Positive Youth Development. Los Angeles: Sage Publications, 2007.
MLA-čujuhus (9. p.)ebrary, Inc, et al. Approaches to Positive Youth Development. Sage Publications, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.