Lightfoot, C., Cole, M., & Cole, S. R. (2009). Development of children (6th.). Worth.
Dyfyniad Arddull ChicagoLightfoot, Cynthia, Michael Cole, and Sheila R. Cole. Development of Children. 6th. New York: Worth, 2009.
Dyfyniad MLALightfoot, Cynthia, et al. Development of Children. 6th. Worth, 2009.
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