"Very well done"
— Justin Tadlock What They Say

How can I make a link that looks like the theme’s buttons?

You can use the same button style on links that the theme uses. Use Text mode instead of Visual when editing content (see the two options at the top-right of the editor). Add the theme’s button class to your link. Using Resurrect as an example, you would use this code.

<a href="http://" class="resurrect-button">Text</a>