The original Clark & Wells (1995) cognitive model of social phobia was a foundational step in development of Cognitive Behavioural Therapy (CBT) – see What is CBT?
For professionals:
Please see the following link to the original research paper (a subscription is required):
https://www.psychologytools.com/resource/cognitive-behavioral-model-of-social-phobia-clark-wells-1995/
Other versions of the original research paper are available across a wide range of subscription-based research services but we at SAAUK, cannot yet find a non-subscription version of the original paper.
For general background: