1. Handbook of Positive Psychology;Snyder,2002
2. Psychology of a better life (original title in polish: Psychologia lepszego życia);Trzebińska;Charaktery,2004
3. Fundamentals of the psychology of hope (original title in polish: Podstawy psychologii nadziei);Stefańska-Klar;Psychologia Rzeczywistość,2002
4. The Psychology of What Works;Snyder,1999
5. Learned Optimism;Seligman,1996