What is a Direct Quotation?:
Must be identical to the original, using a narrow segment of the source. They must match the source document word for word and must be attributed to the original author."
Purdue University Online Writing Lab. (2012). Quoting, Paraphrasing, and Summarizing
Most of the time when you cite a source, you want to summarize or paraphrase. Direct quotations should be used sparingly when the situation meets the criteria above.
When you do use direct quotations:
How to Cite a Direct Quotation:
When and How Much to Quote
From the Harvard Guide to Using Sources