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Lua i Stíl Chicago (17ú heag.)Fenson, Larry, Michael Tomasello, Carolyn B. Mervis, agus Joan Stiles. Variability in Early Communicative Development. Chicago, Ill: Society for Research in Child Development, 1994.
Lua MLA (9ú heag.)Fenson, Larry, et al. Variability in Early Communicative Development. Society for Research in Child Development, 1994.
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