Cita APA (7th ed.)
Ruff, H. A., & Rothbart, M. K. (2001). Attention in early development: Themes and variations. Oxford University Press.
Cita Chicago (17th ed.)
Ruff, Holly Alliger, i Mary Klevjord Rothbart. Attention in Early Development: Themes and Variations. New York: Oxford University Press, 2001.
Cita MLA (9th ed.)
Ruff, Holly Alliger, i Mary Klevjord Rothbart. Attention in Early Development: Themes and Variations. Oxford University Press, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.