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Purcell-Gates, V. (1996). Dab neeg, daim coupon, thiab TV qhia. Kev sib raug zoo ntawm kev nyeem ntawv hauv tsev expe-riences thiab kev paub txog kev paub nyeem ntawv. Hauv: Nyeem Kev Tshawb Fawb Peb Hlis 31/4, S. 406–428. Taylor, B. & Pearson, DP (2002). Cov Tsev Kawm Ntawv Zoo, Cov Xib Fwb Ua tiav: Cov Lus Qhia Txog Kev Nyeem Ntawv Qib Pib hauv Cov Tsev Kawm Ntawv tau nyiaj tsawg.
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