If you're using the "Cite Them Right" version of the Harvard Style, here is how to reference handouts, PowerPoints and your own essays correctly:
from Information Skills: all you need to know http://ift.tt/2p0AETe
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The blog for Tavistock & Portman NHS Foundation Trust's Library.
Specialised in psychoanalysis, psychotherapy, family therapy, forensic psychotherapy, educational psychology, clinical psychology, social work...