If you would like to reference another post in your own, there are a few ways:

1. in the web client, copy the link to the post. You can right-click on the time/date in the post ("2h", "January 1", etc.) and copy the link. If you are using a different client/app, try the "share" option.

Then paste the link in your own post. When someone clicks on/taps it, it will open in a web browser or in their client, depending on what they're using.

2. Make a reply to the post, but delete the original poster's handle that is automatically inserted. It will look like a normal post in the feed, but when selected, it will show the original post over it, like a regular reply. You will have to boost your own post in order to make it show up in other people's feeds.