APA
Sheldon B., . (1995). Cognitive Behavioural Therapy. London: Routledge.
Chicago
Sheldon Brian, . 1995. Cognitive Behavioural Therapy. London: Routledge.
Harvard
Sheldon B., . (1995). Cognitive Behavioural Therapy. London: Routledge.
MLA
Sheldon Brian, . Cognitive Behavioural Therapy. London: Routledge. 1995.