It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Good examples of how cite an article with a DOI assigned in the APA Style, and also how to cite a online Scholary article when NO DOI has been assigned.
A few tips...
Include references in your presentations; Citing is NOT just for reports/papers
Every reference you include MUST be cited; if you don't use it, don't include it
Quality of evidence is important - evaluate your resources before you cite them