1. Bledsoe, N., & Shepherd, J. (1982). A study of reliability and validity of a Preschool Play Scale. American Journal of Occupational Therapy, 36, 783–788.
2. Jankovich, M., Mullen, J., Rinear, E., Tanta, K., & Deitz, J. (2008). Revised Knox Preschool Play Scale: Interrater agreement and construct validity. American Journal of Occupational Therapy, 62, 221–227.
3. Kennedy-Behr, A., Rodger, S., & Mickan, S. (2013). A comparison of the play skills of preschool children with and without developmental coordination disorder. OTJR: Occupation, Participation and Health, 33, 198–208.
4. Knox, S. (1974). A play scale. In M. Reilly (Ed.), Play as exploratory learning (pp. 247–266). Beverly Hills: Sage.
5. Knox, S. (1997). Development and current use of the Knox Preschool Play Scale. In L. D. Parham & L. S. Fazio (Eds.), Play in occupational therapy for children (pp. 35–51). St. Louis: Mosby Year Book.