Goodstein, P. K., & Verdick, E. (2012). Bystander power: Now with anti-bullying action. Free Spirit Pub..
Lua i Stíl Chicago (17ú heag.)Goodstein, Phyllis Kaufman, agus Elizabeth Verdick. Bystander Power: Now with Anti-bullying Action. Minneapolis, MN: Free Spirit Pub., 2012.
Lua MLA (8ú heag.)Goodstein, Phyllis Kaufman, agus Elizabeth Verdick. Bystander Power: Now with Anti-bullying Action. Free Spirit Pub., 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.