This plugin allows you to simply enter in PubMed IDs (PMIDs) and have a references list automatically built at the bottom of your post for you.
Download the plugin
Extract the contents of pmid-citation-plus.zip to wp-content/plugins/ folder. You should get a folder called pmid-citation-plus.
Activate the Plugin in WP-Admin.
Go to your post composition page, and enter in your comma separated list of PubMed IDs in the field at the top right hand of the page.