Hillman, C. B. (1995). Before the school bell rings. Phi Delta Kappa Educational Foundation.
Chicago-viite (17. p.)Hillman, Carol B. Before the School Bell Rings. Indiana: Phi Delta Kappa Educational Foundation, 1995.
MLA-viite (9. p.)Hillman, Carol B. Before the School Bell Rings. Phi Delta Kappa Educational Foundation, 1995.
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