Fenson, L., Tomasello, M., Mervis, C. B., & Stiles, J. (1994). Variability in early communicative development. Society for Research in Child Development.
Chicago-viite (17. p.)Fenson, Larry, Michael Tomasello, Carolyn B. Mervis, ja Joan Stiles. Variability in Early Communicative Development. Chicago, Ill: Society for Research in Child Development, 1994.
MLA-viite (9. p.)Fenson, Larry, et al. Variability in Early Communicative Development. Society for Research in Child Development, 1994.
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