*Spiegel, R. (1978). Review of 'Insights from the blind: Comparative studies of blind and sighted infants'. American Journal Of Orthopsychiatry, 48(2), 363-366. doi:10.1037/h0098962 
 *Weatherston, D. (2007). Returning the treasure to babies: Infant mental health and Early Head Start. Infant Mental Health Journal, 28(2), 246-251. doi:10.1002/imhj.20132