Do not post a link by itself.

Give a short explanation of what the reader will find at the links.

Always a good idea, I like to get an idea of what I'm about to get into.

Credit MUST be given!

Failure to do so could result in a copyright infringement suit.

links are easily added to the post. the process is extremely simple.

right click on the url in the address bar
it will then highlight and a drop box will appear
containing cut,copy, paste, delete
left click on copy

(happen to hit cut or paste, delete you can simply refresh the address bar and the url will reappear)

then simply paste it into your article in your chosen spot. Top or bottom it doesn't matter.

to paste it into place you place your cursor where you want the url and right click and the same drop box will reappear. click paste and you are done.