Justification of using the theory TPB as a theoretical framework

Justification of using the theory TPB as a theoretical framework   Order Description   This is a part of Ph.D. DISSERTATION. I am using the planed behavioral theory (TPB), as a theoretical framework. I already describe the theory and define it. I only need a justification to use it. Attached an example of justification of using the same theory. Please use this as an example and use the articles and citations too mentioned in this example. Another article is attached which will help to justify why is this theory is fit to my research.