Bereiter, C., & Engelmann, S. (1966). Teaching disadvantaged children in the preschool. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Bereiter, Carl, agus Siegfried Engelmann. Teaching Disadvantaged Children in the Preschool. Englewood Cliffs, NJ: Prentice-Hall, 1966.
Lua MLA (9ú heag.)Bereiter, Carl, agus Siegfried Engelmann. Teaching Disadvantaged Children in the Preschool. Prentice-Hall, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.