Publishing an ebook with eLearning link on Amazon

How do I publish an ebook with a link to an eLearning lesson on Amazon? I prefer to use Amazon Kindle Direct Publishing (KDP) but it's not a must.

Any current examples? 

Basically, KDP told me to publish or try and publish it. But, the review team might reject it.

Below is what KDP told me so far. 
Ebooks with links might be sold through Amazon, but not published through KDP… the content review team operates within KDP only, therefore they decide whether they approve or reject books on KDP only.