The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for writers, editors, …

Chicago-style source citations come in two varieties: (1) notes and bibliography and (2) author-date. If you already know which system to use, follow one of the links above to see sample …

For more details and many more examples, see chapters 13 and 14 of The Chicago Manual of Style. For examples of the same citations using the notes and bibliography system, follow the …

6.126 Question mark with exclamation point Lists and Outline Style 6.127 Lists and outlines—general principles 6.128 Run-in versus vertical lists 6.129 Run-in lists 6.130 Vertical …

In extracts from modem authors whose spelling and punctuation differ but slightly from ours, and where such variations do not affect the meaning, use office style.

The Chicago Manual of Style, 17th ed. Chicago: University of Chicago Press, 2017. https://doi.org/10.7208/cmos17

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We could have flipped a coin and settled on all-caps “AM” and “PM” (but not “A.M.” and “P.M.”; Chicago style now omits periods in abbreviations that include two or more capital letters).

For more details and many more examples, see chapters 13 and 14 of The Chicago Manual of Style. For examples of the same citations using the author-date system, follow the Author …

We’d do the same for “i.e.” and “e.g.” (i.e., writing “I.e.” and “E.g.”). But those two abbreviations usually occur in parentheses in Chicago style, and there are no examples of either in the …