[newplagiarist]

It can work on it's own, true, but it is more effective if used in combination with medication. [1]

Though CBT doesn't seem to be more effective compared to other types of therapy for treating depression. It is still better than no therapy. [2]

[1] Chan EK-H. Efficacy of cognitive-behavioral, pharmacological, and combined treatments of depression: A meta-analysis.

[2]Hoffman et al. The Efficacy of Cognitive Behavioral Therapy: A Review of Meta-analyses.