Presentations, such as PowerPoint Slides, can be found online. They can be published by reputable organisations; such as, NASA. Often, when PowerPoints are returned in a Google search they are downloaded directly from the search results. If this is the case, there will be no URL to include in your References.
To enter PowerPoints in your References, in Citemaker, choose: Digital > Presentations.
Include all relevant information you can retrieve. Do not include a partial URL. If you can locate the author as an individual or organisation, along with the title of the presentation, your audience should be able to locate the presentation online even without a URL.
PowerPoint without a URL
Entry in your References:
National Oceanic and Atmospheric Administration. (2016). Threats to Coral Reefs [PowerPoint Slides].
In-Text Citations:
(National Oceanic and Atmospheric Administration, 2016)
OR
According to the National Oceanic and Atmospheric Administration (2016) climate change ...
PowerPoint with a URL
Entry in your References:
Day, J. (2001). Management of the Great Barrier Reef World Heritage Area. [PowerPoint Slides]. Retrieved from http://whc.unesco.org/document/9217
In-Text Citations:
Day, (2001)
OR
According to Day (2001) people often misunderstand ...