Hello!

To answer your question about citing wiki: You would use "Wikipedia" and the year from the reference section.

To remove the comments, you need to actually right-click on each and select "Delete." Or, you can click on the comment and hit the Delete button on your keyboard. 

Some people call the track changes "comments" as well, so just to make sure you have what you need--to remove Track Changes, you can either read all of them and make your own changes and then select "Accept all Changes" under "Review," or you can individually go through and right-click and Accept each one. Either way, I recommend you Accept All Changes when you are done anyway, to make sure there aren't any leftover spacing changes marked that you didn't see.

Comments and Track Changes must be removed separately.

I hope that helps! Please let me know if you need any more information.

Thanks,
EditPro