To read: Citation Software Tools
What is citation management software?
Citation management software, also called “bibliographic software”, allows you to organize, store, and retrieve information, such as citations for books, articles, and web sites. You can simultaneously import records and PDFs from databases. You can add abstracts, keywords and other functions that enhance and improve the efficiency of your project. The citation manager then works with word-processing software to insert properly formatted footnotes or citations into a paper and create a bibliography.
What it won't do:
It will not always create a perfect bibliography or reference list according to your favorite style. For example, you will still have to know APA, MLA, Chicago or others and check over your results. It will not correct errors or omissions that were in the database from which you retrieved references. It will not always know what type of material you are putting into it from a database (e.g. it cannot always distinguish a proceeding from a book).
What are online citation builders?
Citation builders are free, online sites that allow you to quickly create citations and bibliographies but not to store information or link to word-processing software. Here is a short list* of the best online free citation tools (*please have in mind that the list is not exhaustive):