How do I link to Facebook or Tweet share Button?

[Musik]

I want to link directly to a Tweet button from an external site so when a visitor on my site clicks on the Tweet button it will add to the Tweet count on the external site.

The External Tweet count will display on my site and when someone clicks the Tweet on my site it'll add to the Tweet on an external site.

I want to do the same with Facebooks Like button and AddThis share button.

Thanks!