1. Diagnostic and Statistical Manual of Mental Disorders,1994
2. Obsessional States;Beech,1974
3. Grace Abounding to the Chief of Sinners: or, a Brief and Faithful Relation of the Exceeding Mercy of God in Christ, to his Poor Servant John Bunyan;Bunyan,1666
4. The Anatomy of Melancholy, What It Is. With All the Kinds, Causes, Symptomes, Prognostickes, and Several Cures of it by Democritus Junior;Burton,1621
5. The Leyton Obsessional Inventory: a principal components analysis on normal subjects;Cooper;Psychological Medicine,1973