APA Style (American Psychological Association) is generally used in business
APA style guides are at http://library.queensu.ca/help-services/citing-sources
Also, guides for business, government and legal sources.
Listing references: cite your sources in full at the end of your report.
In-text citations provide just enough information for readers to locate the full citation in the reference list at the end of the report.
Sources include academic articles and books, but also newspapers, magazines, government reports, statistics, web sites, social media, video...
Student Academic Success Services
Plagiarism: Real Life Examples (Rutgers Library via YouTube)