Writing a presentation or report usually requires information from many sources (for example, a company's 10-K, market research reports, newspaper articles).
To maintain your professional and academic reputation, you must cite every source.
This guide provides examples of how to cite many different business information sources in APA format.
In the academic setting, we use formalized styles of attribution. Formatting your citations in a format like APA is just a standardized means of giving credit to the person or company who created the content you use. The content creator may be an author, blogger, photographer, or your professor, for example. Outside of academia, you'll probably cite your work in different ways. For a list of great examples, see Corey Eridon's blog post .
There are many, many different citation styles to choose from. Depending on your discipline, target audience, or place of work (even Buzzfeed has its own style), you will be asked to use different styles in different situations. In addition to prescribing how to cite sources, these styles also dictate standard formats for many aspects of writing (for example, organizing the content of your paper, whether to use footnotes, and even grammar rules).