A published dissertation is a book and should be cited accordingly.
Aggrey, K. K. (2012). The collaboration between the NHS Trusts (Lincolnshire Foundation Partnership Trusts) and the
voluntary sector on performance of mental health care delivery in Lincolnshire. (Unpublished doctoral dissertation).
University of Lincoln, Lincoln.
Author(s)' surname, Initials. (Year of publication). Title of thesis/dissertation. (Description). Institution and place where
thesis/dissertation is held.