The phrase "to reference this post" means to mention or use this post as a source of information or as a point of reference for something you are discussing or writing about. Full definition
I'll be referencing your post in a future article, thanks for the good info about the antibiotic properties. (herbangardener.com)
Being a newbie, I didn't understand why my regular detergent wasn't good enough, this would have been a great reference post when I was staring out. (thirstiesbaby.com)
I have 15 posts on this page before this one, and I see about 25 + posts referencing my posts. (wattsupwiththat.com)