Introduce a list with a sentence or a sentence fragment. Place a colon after the introductory sentence or the introductory sentence fragment.

End each entry with a period if all entries are complete sentences or a mixture of fragments and complete sentences.

Do not use a period after the last item in a list unless:

• The last item is a complete sentence.
• The list consists of a mixture of sentence fragments and sentences, and each item ends with a period.