Quote, Quote, Paraphrase
When citing an authority, there are three primary methods to reproduce their results: direct quotes, indirect quotes, and paraphrases. Quotations are used when the exact language of the speaker is important, and should generally be used sparingly because they interrupt the flow of your own writing. Quotations should always be introduced with their source; short quotes can be integrated into your text, while longer quotes (more than four lines) should be set off by indenting.
This is an example of a longer quote; I would have ended the previous paragraph with something like "In his 2010 article on citing references, William Springer said:. Setting this paragraph apart thus makes it clear exactly what part of the text is a quote, while avoiding the awkwardness involved with trying to integrate it into your writing. This is called a block quote and, like regularly quotes, should be used sparingly to avoid disrupting the flow of the text.
An indirect quote is similar to a direct quote but does not use quotation marks; instead, you report what someone else said. For example, "William Springer claims that you should be careful to cite your sources" would be an indirect quote. This is similar to a paraphrase, in which you rewrite what someone else said in your own words; however, in a paraphrase, it is the information that is important and the original source will be acknowledged with a citation at the end of the line rather than at the beginning of the sentence as in the indirect quotation above (like this, 2010).