1. Alexander, J. C., Eyerman, R., Giesen, B., Smelser, N. J., & Sztompka, P. (2004). Cultural trauma and collective identity. University of California.
2. American Psychiatric Association (APA). (1952). Diagnostic and statistical manual of mental disorders I. American Psychiatric Association.
3. American Psychiatric Association (APA). (1968). Diagnostic and statistical manual of mental disorders II. American Psychiatric Association.
4. American Psychiatric Association (APA). (1980). Diagnostic and statistical manual of mental disorders III. American Psychiatric Association.
5. American Psychiatric Association (APA). (1987). Diagnostic and statistical manual of mental disorders III R (text revision). American Psychiatric Association.