There are three ways to do this.
1. You can add the link in between the work. I mean, you can give reference of one hub in another. For example, I wrote a hub about depression first and then wrote a hub about self treatment for depression. So, I made a note of one hub in another, in middle of the hub itself.
2. At the end, you can add externally the links to your other hub (even non related ones), with a title like "My other works" or "You would love to read these hubs too", etc...
3. Add the rss capsule, link your hubs and you would be able to put your hub list (max 8), anywhere around your hub. I found this one yesterday only and now placed in few of my hubs. Need to do for the rest of my hubs.
Hope this help.