Ruff, H. A., & Rothbart, M. K. (1996). Attention in early development: Themes and variations. New York: Oxford University Press.
Trích dẫn kiểu ChicagoRuff, Holly Alliger., và Mary Klevjord Rothbart. Attention in Early Development: Themes and Variations. New York: Oxford University Press, 1996.
Deismireacht MLARuff, Holly Alliger., và Mary Klevjord Rothbart. Attention in Early Development: Themes and Variations. New York: Oxford University Press, 1996.
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