제목: The Optimistic Child 저자: Martin E. P. Seligman Mariner Books; Reprint edition (September 17, 2007) https://www.amazon.com/Optimistic-Child-Safeguard-Depression-Resilience/dp/0618918094/ref=sr_1_1?s=books&ie=UTF8&qid=1535377797&sr=1-1&keywords=seligman+the+optimistic+child
