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