APA-referens (7:e uppl.)

Harris, J. (1990). Early language development: Implications for clinical and educational practice. Routledge.

Chicago-referens (17:e uppl.)

Harris, John. Early Language Development: Implications for Clinical and Educational Practice. London ; New York: Routledge, 1990.

MLA-referens (9:e uppl.)

Harris, John. Early Language Development: Implications for Clinical and Educational Practice. Routledge, 1990.

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