Gage, N. (1984). Educational psychologyN.L. Gage, David C. Berliner. Houghton.
Lua i Stíl Chicago (17ú heag.)Gage, N.L. Educational PsychologyN.L. Gage, David C. Berliner. Houghton, 1984.
Lua MLA (8ú heag.)Gage, N.L. Educational PsychologyN.L. Gage, David C. Berliner. Houghton, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.