Keenan, T. (2002). An introduction to child development. SAGE Publications.
Cita Chicago (17th ed.)Keenan, Thomas. An Introduction to Child Development. London ; Thousand Oaks, Calif.: SAGE Publications, 2002.
Cita MLA (8th ed.)Keenan, Thomas. An Introduction to Child Development. SAGE Publications, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.