Read More within Post

Is there a way to use the “Read More” button option within a wordpress post? My issue is that I have long posts that have a bibliography at the bottom. I want to keep the bibliography, but I want it to be collapseable. I want users to be able to scroll down and click on the word “Bibliography” (which ideally, will have a little arrow) and the content of bibliography will drop down.

Here’s a post that I’d like to use it in:

https://www.managingcities.com/featured/municipal-broadband-new-arena-new-competitor/

any ideas?