All Knowledge is organized in “categories”. “Reference” is any source you used to create your content, it is the Category for citations.
All the #reference items in our database are presented with this icon next to the name of the content:
Every time you see this symbol it means you are dealing with a #reference.
As usual, we advise you to upload only original content. But every one of us bases his knowledge on the solid ground of every book read, every presentation or course attended, every master followed. So even the most original of ideas arose from previous knowledge. The process of sharing the Knowledge starts from sharing the nourishment that allowed to our original idea to spark. Cite all your sources linking to the Unit of Knowledge you are publishing, sharing all the references.
If the reference is already in the Database it needs just a couple of clicks to add one of the sources and allow every one reading your idea to understand more about it.
See here detailed information on How to Edit this Unit of Knowledge.