Thornburg, H. D. (1982). Development in adolescence (2nd.ed.). Brooks/Cole.
Lua i Stíl Chicago (17ú heag.)Thornburg, Hersel D. Development in Adolescence. 2nd.ed. Monterey: Brooks/Cole, 1982.
Lua MLA (9ú heag.)Thornburg, Hersel D. Development in Adolescence. 2nd.ed. Brooks/Cole, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.