Developing Theory-informed Behaviour Change Interventions to Implement Evidence into Practice
            
        
            
    
    
                
            French, S. D., Green, S. E., O’Connor, D. A., McKenzie, J. E., Francis, J. J., Michie, S., Buchbinder, R., Schattner, P., Spike, N. & Grimshaw, J. M. (2012). Developing theory-informed behaviour change interventions to implement evidence into practice: A systematic approach using the Theoretical Domains Framework. Implementation Science, 7(38), 1–8. 
This article shows how a real health intervention was built using a structured approach to theory selection. It walks through how researchers chose which theories and constructs to use, and how they turned those into strategies. It’s a strong example of how to explain the “why” behind theory choices in public health.