Cita APA

Piek, J. P., & Piek, J. P. (2006). Infant motor development. Champaign, Ill.: Human Kinetics.

Citación estilo Chicago

Piek, Jan P., y Jan P. Piek. Infant Motor Development. Champaign, Ill.: Human Kinetics, 2006.

Cita MLA

Piek, Jan P., y Jan P. Piek. Infant Motor Development. Champaign, Ill.: Human Kinetics, 2006.