Cita APA (7a ed.)

Halpenny, A. M., & Pettersen, J. (2014). Introducing Piaget: A guide for practitioners and students in early years education. Routledge.

Cita Chicago Style (17a ed.)

Halpenny, Ann Marie, y Jan Pettersen. Introducing Piaget: A Guide for Practitioners and Students in Early Years Education. London [etc.]: Routledge, 2014.

Cita MLA (9a ed.)

Halpenny, Ann Marie, y Jan Pettersen. Introducing Piaget: A Guide for Practitioners and Students in Early Years Education. Routledge, 2014.