See
https://www.youtube.com/watch?v=rRR-5NSpKyE for an overview of what to do. basically you need a csl file that provides the style you want, and you specify it like this in the org file or in default settings. You may also need a locale file if you are not blogging in english.
#+csl-style: apa-5th-edition.csl
#+csl-locale: en-US
You can find a basic example org file for html export with CSL at
https://github.com/jkitchin/org-ref/blob/master/examples/basic-csl.org
Here is a minimal way to export your blog file I suppose.
(let ((org-export-before-parsing-hook '(org-ref-csl-preprocess-buffer)))
(org-open-file (org-html-export-to-html)))
John
-----------------------------------
Professor John Kitchin (he/him/his)
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803