Gaya APA

Eron, L, D. et al (1996). Reason to hope : a psychosocial perspective on viclence and youth (2nd ed). Washington: American Psychological Association.

Gaya MLA

Eron, Leonard, D.. et al. "Reason to hope : a psychosocial perspective on viclence and youth". 2nd ed Washington: American Psychological Association, 1996. Text.