Hillman, C. B. (1995). Before the school bell rings. Phi Delta Kappa Educational Foundation.
Lua i Stíl Chicago (17ú heag.)Hillman, Carol B. Before the School Bell Rings. Indiana: Phi Delta Kappa Educational Foundation, 1995.
Lua MLA (9ú heag.)Hillman, Carol B. Before the School Bell Rings. Phi Delta Kappa Educational Foundation, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.