1. Berkley, B. J., & Thayer, J. R. (2000). Policing entertainment districts. PIJPSM, 23(4). Retrieved from: http://rhiweb.org/documents/Entertainment_Policing.pdf
2. The Search for Job Satisfaction: A Survey of Alabama Policing
3. Chen, D. (2014) Tourism security and police – important part of destination image. Tourism Review. Retrieved from https://www.tourism-review.com/travel-tourism-magazine-tourism-police-create-the-image-of-the-destination-article2450
4. Cuskelly, C. (2017) Warning: Could you fall victim to scam police officers on your summer 2017 holiday. Express. Retrieved from https://www.express.co.uk/travel/articles/765307/travel-scam-fake-police-officer-holiday
5. Dean Runyan Associates. (2017). The economic impact of travel on Texas 1994-2016p. Dean Runyan Associates. Retrieved from https://travel.texas.gov/tti/media/PDFs/TXImp16p_1.pdf