content types

I have used Drupal for a few years now but have a request that I am not quite sure how to accomplish in Drupal. I want to have a content type called "Sidebar" which has a few fields (Title and body). Then I want another Content type called "Website Page" that has some fields but also a "Sidebar" section that has a checkbox option for "Sidebar" which then adds that sidebar content to that page. I want to be able to add different Sidebar nodes, which the title pulls to that section of the Website Page Section area.