Sometimes you can copy a reference from the citing article.
However, I just wanted to share this tip for quickly getting APA formatted references for when you find an article through Google Scholar.
- Set Google scholar preferences to permit exporting of Bibtex refences
- Search in Google scholar for your article; click on Import in Bibtex
Import into Bibtex
- Copy the bibtex reference to the clipboard
- Paste into this form: http://ref.lexique.org/
- Copy and paste results (an APA formatted reference) into your answer
Feel free to share any other tips for getting formatted references into Stack Exchange answers.