Does PowerPoint presentation require in-text referencing if there is a written script?
The answer depends significantly on what your professor wants. The straightforward answer is to simply ask your professor. However, erring on the side of caution should not hurt.
You could simply add in-text citations on each slide. If you have text on your slides making claims, you can add citations right there. Then, you can have your final slide be a works cited page.
Another way to cite is to say &quot;according to source, claim&quot;. By specifically mentioning sources when you speak, you can cite them verbally and fix this issue. This would be easier, as the audience is more likely to pick up on your sources, and you can cite claims even if they are not written on your slides.
Even if you did not need to cite sources, there would presumably be no harm in doing so.