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Chapter 11.
11.13.
Letter designations in mathematical and scientific matter, except chemical symbols, are italicized.
11.14.
Letter symbols used in legends to illustrations, drawings, etc., or in text as references to such material, are set in italic without periods and are capitalized if so shown in copy.
11.15.
Letters (a), (b), (c), etc., and a, b, c, etc., used to indicate sections or paragraphs, are italicized in general work but not in laws and other legal documents.
11.16.
Internet Web sites and email addresses should be set in roman.
