APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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