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Illinois State Univ.: Punctuation Made Simple Colons
What purpose does a colon serve in a sentence? Use this website for explanations and examples of colon use.
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Punctuation Mark Rules: The Colon
A fairly comprehensive look at the uses and misuses of the grammatical element "the colon" in English punctuation. Includes information and several examples.
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Sandhills Community College: The Colon
A brief lesson on the uses of the colon in English punctuation. Includes examples and links for further information.