Hittleman, D. R. (2002). Interpreting educational research (2nd ed.). Merril/Orentice-Hall.
Lua i Stíl Chicago (17ú heag.)Hittleman, Daniel R. Interpreting Educational Research. 2nd ed. Upper Saddle River, New Jersey: Merril/Orentice-Hall, 2002.
Lua MLA (9ú heag.)Hittleman, Daniel R. Interpreting Educational Research. 2nd ed. Merril/Orentice-Hall, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.