1. The Individual and His Religion;Allport,1950
2. Fondamenti e applicazioni della logoterapia;Frankl,1977
3. Psychologia Egzystencji (The Psychology of Existence);Popielski,2008
4. Phenomenological psychology and religious experience;Wulff,1995
5. The Importance of Terminal Values and Religious Experience of God’s Presence and God’s Absence in the Lives of University Students with Various Levels of Empathy