From Hard Drop Tetris Wiki
Hi Cream, I just sent a similar message to this to PandaEDIT, but felt it was important to share with you as well. First off, thanks for all the contributions lately on the Wiki. Please make sure that if using a majority of content from a single source to add a ==See Also== section with the source article linked. This includes articles from Youtube videos, four.lol, Japanese wikis, or tweets.
A lot of time and effort was spent to research and create diagrams for those setups, so we want to make sure we properly credit the place where the information originated from.
Thanks again for your hard work!