It's important to cite your sources, for a variety of reasons:
Accidental Plagiarism - Don't Let It Happen to You: This tutorial shows how accidental plagiarism can occur and how to avoid it.
Quoting, Paraphrasing, and Summarizing: This helpful resource from the OWL (Online Writing Lab) at Purdue University includes a practice exercise.
There are a variety of citation styles. Use the one specified by your instructor. If one isn't specified, the field of business typically uses American Psychological Association (APA) style.
These guides will help you format citations correctly:
OWL (Online Writing Lab) Research & Citation Resources: This excellent resource from Purdue University covers APA, Chicago and MLA styles. It shows how to properly format in-text citations, footnotes and endnotes, reference lists, and more.
Citation Guide: The library's guide covers APA, MLA and the Chicago Manual of Style. It also lists citation/bibliography software options, such as Refworks, EndNote Web, Mendeley and Zotero.