No worries man, I'll just tell you again how I do it:
1. Hover your arrow key over the little arrow by the "edit" button and click "classic editor".
2. Move your arrow key by to the top right hand corner and click "visual editor".
3. Scroll down to where you think a reference should be added, and if you find any already existing references (they should start with "Refn"), copy and then paste it where you want your reference to be added, and replace the link and group name if you have to.