Create or change a cell reference - Microsoft Support
Make sure to read the detailed notes, such as concerns for complex sheet names may require being placed within single quotation marks.
https://www.youtube.com/watch?v=GnoS...94epMaX_Y8Tu1k
The best YouTube source on Excel is Mike Girvin. The only problem with his YouTube is the quantity an organization issues. However, the linked video can help with both finding the best playlist and his accompanying materials.