Headings. Leave a blank line, or its equivalent in space, after the title or heading of a manuscript. On succeeding pages, if using ruled paper, begin on the first line.
Numerals. Do not spell out dates or other serial numbers. Write them in figures or in Roman notation, as may be appropriate.
August 9, 1918 (9 August 1918)
Rule 3
Chapter XII
352nd Infantry
Parentheses. A sentence containing an expression in parenthesis is punctuated, outside of the marks of parenthesis, exactly as if the expression in parenthesis were absent. The expression within is punctuated as if it stood by itself, except that the final stop is omitted unless it is a question mark or an exclamation point.
I went to his house yesterday (my third attempt to see him), but he had left town.
He declares (and why should we doubt his good faith?) that he is now certain of success.
(When a wholly detached expression or sentence is parenthesized, the final stop comes before the last mark of parenthesis.)
Quotations. Formal quotations, cited as documentary evidence, are introduced by a colon and enclosed in quotation marks.
The provision of the Constitution is: “No tax or duty shall be laid on articles exported from any state.”
Quotations grammatically in apposition or the direct objects of verbs are preceded by a comma and enclosed in quotation marks.
I recall the maxim of La Rochefoucauld, “Gratitude is a lively sense of benefits to come.”
Aristotle says, “Art is an imitation of nature.”
Quotations of an entire line, or more, of verse, are begun on a fresh line and centered, but need not be enclosed in quotation marks.
Wordsworth's enthusiasm for the Revolution was at first unbounded:
Quotations introduced by that are regarded as in indirect discourse and not enclosed in quotation marks.
Keats declares that beauty is truth, truth beauty.