For examples and help, see the Purdue Online Writing Lab -- Research & Citation Resource
Zotero helps you collect, manage, and cite research sources. Zotero allows you to attach PDFs, notes and images to your citations, organize them into collections for different projects, and create bibliographies using Word or Open Office.
You do NOT need to cite:
This handout from the Writing Center at UT/Austin provides some good examples of paraphrasing.
EndNote is a program that makes it possible to collect and organize references in a database and instantly create properly formatted bibliographies.