This site will help you create citations in MLA, APA, Chicago, or Turabian style. You can even get an entire citation simply by entering the ISBN number.
This is another site that will provide you with citations. This cite also gives you the parenthetical citation for the resource.
Why is citing your source so important?
It is imperative to cite sources to avoid plagiarising someone else's work. When considering plagiarism, you should not think in the context of "how many words is it okay to use" before you must include a citation. Plagiarism is the misrepresentation of someone else's ideas as your own, not just the language used to communicate those ideas. If the thought is not your own, even if you have summarized or paraphrased the writing, you must include a citation.
This page contains sources to help you easily create those citations and to help you understand the concept of pagiarism.
This is an MLA formatting guide from the University of Wisconsin- Madison.
This Indiana University site povides information about what plagiarism is, how to recognize it, and how to avoid it.
This resource was produced by the OWL writing center at Purdue University and provides extensive information about how to avoid plagiarising.