Cita APA (7a ed.)

Keenan, T. (2002). An introduction to child development. SAGE Publications.

Cita Chicago Style (17a ed.)

Keenan, Thomas. An Introduction to Child Development. London ; Thousand Oaks, Calif.: SAGE Publications, 2002.

Cita MLA (8a ed.)

Keenan, Thomas. An Introduction to Child Development. SAGE Publications, 2002.