@albertvhons.. thank you for your reply. I used to do that in my Google+ blog in food and flower photography communities... here on steemit, I only do it when the topic is about photography.
The reason why I put notes at the end of my content is because I'd like to let my readers know that it is written by me and it's my intellectual property and not copied from other sources. Perhaps, one of these days, I'd do that in some of my photos. Have a nice start of the week!