제목: Handbook of Hope: Theory, Measures, and Applications저자: C. Richard SnyderAcademic Press; 1 edition (May 8, 2000) https://www.amazon.com/Handbook-Hope-Theory-Measures-Applications/dp/0126540500/ref=sr_1_fkmr0_1?s=books&ie=UTF8&qid=1535378082&sr=1-1-fkmr0&keywords=sydner+handbook+of+hope
제목: Feeling Good: The Science of Well-Being저자: C. Robert CloningerOxford University Press; 1 edition (May 6, 2004) https://www.amazon.com/Feeling-Good-Well-Being-Robert-Cloninger/dp/0195051378/ref=sr_1_1?s=books&ie=UTF8&qid=1535267982&sr=1-1&keywords=feeling+good%3A+the+science+of+well-being