From section 23.4.2.1 LISTS of the Turabian Text, 9th Edition. It is reproduced word-for-word.
Your text may contain lists of items that you choose to enumerate for emphasis. When such a list is relatively short, incorporate it into a single sentence. Be sure that all the items are grammatically parallel (all noun phrases, all adjectives, or the like). Each item should be preceded by an arabic numeral in parentheses. If there are more than two items, each should be followed by a comma (or, if the item is complex in structure, a semicolon; see 21.3). If the list is an appositive, use a colon to introduce it; otherwise do not use punctuation in this position (see 21.4).
Wilson’s secretary gave three reasons for his resignation: (1) advancing age, (2) gradually failing eyesight, and (3) opposition to the war.
The committee strongly endorsed the policies of (1) complete executive power, except as constitutionally limited; (2) strong legislative prerogatives; and (3) limited judicial authority, especially when it interfered with the committee’s own role.
If you are already using arabic numerals in parentheses for other purposes, substitute lowercase letters for the numbers.
Haskin’s latest theory has more than one drawback: (a) it is not based on current evidence, and (b) it has a weak theoretical grounding.
If the items in the list are longer or you wish to give them greater emphasis, arrange them in a vertical list. Introduce the list with a complete sentence followed by a colon. Again, be sure that all the items are grammatically parallel, and begin each one with a bullet or with an arabic numeral followed by a period. If the items are complete sentences, capitalize the first letter in each item and use terminal periods; otherwise use lowercase letters and no periods (see 21.1). Align the numerals on the periods and any lines that run over with the first word in the first line.
My research therefore suggests the following conclusions:
1. The painting could not have been a genuine Picasso, regardless of the claims of earlier scholars.
2. It is impossible to identify the true artist without further technical analysis.
Source:
Turabian, Kate L.. A Manual for Writers of Research Papers, Theses, and Dissertations, Ninth Edition (Chicago Guides to Writing, Editing, and Publishing) (p. 340). University of Chicago Press. Kindle Edition.
