Note that this format does not include a period even at the end of the last element. Most writers, however, want to use some kind of punctuation in their listed items. When the introductory statement is a complete sentence, you can end it with either a period or a colon. Use a colon if the sentence is clearly anticipatory of the list, especially if it contains phrasing such as the following or as follows . A colon is also appropriate if the list that follows will be numbered or will establish a priority order. If the introductory statement is not a complete statement, however, neither a period nor a colon would be appropriate since that would interrupt the grammatical structure of the statement; use either no punctuation or try the dash technique noted above.