Step 1: After you've run a search in PubMed, use the left-hand filters and keep scrolling until you see the box that says Additional filters.
Step 2: Select Additional Filters
Step 3: Once in Additional Filters, select Journal. Check the box next to Nursing and select Show. Note: Your filter is still not applied, see next step!
Step 4: Journal will then display in the left-hand filters menu. Check the Nursing journals box!
PubMed has now added the option to get an APA style citation. Beware: Databases do make citation mistakes, so always double check the database's "APA" citation against an APA style Guide. Here are the steps to follow to get a start on your APA citations from PubMed:
Below is a screenshot with the steps numbered for getting an APA style citation from PubMed.