Major manuals used for the diagnosis of schizophrenia:

American Psychiatric Association. Diagnostic and statistical manual of mental disorders: DSM-IV. 4th edition: American Psychiatric Association. 1994:866;

WHO. ICD-10 Classification. 1993. Available from: https://www.who.int/classifications/icd/en/GRNBOOK.pdf.
Accessed April 2016;

American Psychiatric Association. Diagnostic and statistical manual of mental disorders 5th edition: American Psychiatric Association. 2013;

WHO. ICD-11 Classification. 2018. Available from:
https://icd.who.int/browse11/l-m/en/