User talk:Above00100
I can not find any contribution you made about cars. Possibly you did not click on the save button????
You need to support you contributions with citations - if there is disagreement it can be discussed on the articles talk page.
There is a "Cite" toolbar at the top of the edit window which allows you to automatically generate the required wiki code.
You click one of the templates, e.g. "book", and fill in the details.
More information can be found in Wikipedia:Referencing for beginners or the citations tutorial (the below video will play best in Firefox or Chrome):
Hope this helps,