I found out that it’s difficult to find the LinkedIn-profile-button that LinkedIn uses for members who want to promote their LinkedIn profile. So here is the link to the page where you can generate this button-code for your website or profile. https://www.linkedin.com/profile?promoteProfile=

If you are a member of the Dutch networking site Hyves.nl you can add the button to your profile information like the following code:

[gadget][/gadget]

That results in the following button: