Final answer:
The correct line-spacing for an academic paper is double-spaced throughout, including block quotations and references.
Step-by-step explanation:
The correct line-spacing for an academic paper is double-spaced throughout, including block quotations and references. This means that there should be one blank line between each line of text. The works-cited page should also be double-spaced. For example:
This is an example of a block quotation.
Block quotations should be used sparingly and only when you plan to quote three or more lines or sentences.