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The three most commonly used citation styles are represented by the following manuals: The Publication Manual of the American Psychological Association (APA style), The MLA Handbook (MLA style), and The Chicago Manual of Style (Chicago style). Generally speaking, the sciences and social sciences tend to use the APA or Chicago style while the humanities will often use the MLA style.
There is no "official" style for citing business sources. Therefore, researchers usually adapt one of the above styles to cite business sources. Whatever style you choose, use it consistently for the entire project/paper. Listed below are examples of citing business sources using specific citation styles
This guide from Harvard Business School is based on the Chicago Style. It provides guidance on creating footnotes, source lines, and bibliographies. It also includes examples of citations for advertisements, analyst reports, articles, blogs, books, brochures, cases, charts, conference papers, databases, emails, interviews, legal cases, podcasts, SEC filings, tables, videos, and more.