Pohjautuu alkuperäisraportteihin: Koller, Gerald: Meet the need, guidelines for peer group education, preventing addiction in out-of-school youth work ; Kern-Scheffeldt, Walter & Wirth, Steffi: Parents as peers, new approaches to parent education.
Pohjautuu alkuperäisraportteihin: Meet the need, guidelines for peer group education, preventing addiction in out-of-school youth work / Gerald Koller. Parents as peers, new approaches to parent education / Walter Kern-Scheffeldt & Steffi Wirth.
