Help:References

Refrences on the wiki are important because they validate the information on a page, and gives the reader a chance to go directly to the source. Any editor can remove undefined material, and an article missing many citations may be deleted.

Good refrences
A refrence shoud be accurate, i.e. it must prove the statement in the text. For example, to validate that the green flag is the most used block, its no good to link to a page talking about blocks, if it does not say which is most used; nor to one on the When Green Flag Clicked block, if it does not say that it is most used. You have to link to a source that proves the statement is true. You must use reliable sources, generally a forum topic or an official info page.

Inserting References
To add references, first find the place in the edit window where you wish to add a citation — generally at the end of a sentence, after the period — and select that location. Then click the button in the edittools below the edit window. Insert the referenced text, generally a simple link to the source.

Additionally, to make two references refer to the same source, name one reference and repeat with another.

Citation Needed
If a citation is required, you can put Citation_needed  next to the area where a refrence is required.

You may also use cn  which is it's shortcut.