Thank you for the tip. I don't credit the photos mainly because they are all from Pexels, so they can all be found there, and because they are all free to use, as long as I don't directly sell them or as long as I don't put the identifiable people in them in a bad / offensive light. I might post a link to the authors on the website at some point, when I have the time, but I currently have very little available, so I focus more on the content itself. Once I go back home and I'll have a few months at my disposal, I'll go back to the articles I posted and add links to all the images.