Kettelkamp, G. C. (1954). Teaching adolescents. Heath.
Lua i Stíl Chicago (17ú heag.)Kettelkamp, Gilbert Clarence. Teaching Adolescents. Boston: Heath, 1954.
Lua MLA (9ú heag.)Kettelkamp, Gilbert Clarence. Teaching Adolescents. Heath, 1954.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.