Schlinger H (January 17, 2021). "The Impact of B. F. Skinner's Science of Operant Learning on Early Childhood Research, Theory, Treatment, and Care". Early Child Development and Care. 191 (7–8): 1089–1106. doi:10.1080/03004430.2020.1855155. S2CID234206521 – via Routledge.
Schlinger H (January 17, 2021). "The Impact of B. F. Skinner's Science of Operant Learning on Early Childhood Research, Theory, Treatment, and Care". Early Child Development and Care. 191 (7–8): 1089–1106. doi:10.1080/03004430.2020.1855155. S2CID234206521 – via Routledge.