For titles and subtitles of published books, pamphlets, proceedings and collections, periodicals, and newspapers. To designate particle names. For mathematical variables. To designate a word being used as a word. Titles of articles.
Numbers Write numbers from zero to nine as words.
Use digits for numbers over nine. Use quotation marks around only the quoted words. Use ellipsis to show omission of unimportant or irrelevant words from a quotation. QuickNews One word. For additional spellings, see also SLACspeak .