Cita APA (7a ed.)

Keats, J. A., Collis, K. F., & Halford, G. S. (1978). Cognitive development: Research based on a Neo-Piagetian approach. Wiley & Sons.

Cita Chicago Style (17a ed.)

Keats, J. A., Kevin F. Collis, y Graeme S. Halford. Cognitive Development: Research Based on a Neo-Piagetian Approach. Chichester [etc.]: Wiley & Sons, 1978.

Cita MLA (9a ed.)

Keats, J. A., et al. Cognitive Development: Research Based on a Neo-Piagetian Approach. Wiley & Sons, 1978.