The Elements of Style/Form

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.

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.

(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.

Quotations grammatically in apposition or the direct objects of verbs are preceded by a comma and enclosed in quotation marks.

Quotations of an entire line, or more, of verse, are begun on a fresh line and centred, but not enclosed in quotation marks.

Quotations introduced by that are regarded as in indirect discourse and not enclosed in quotation marks.

Proverbial expressions and familiar phrases of literary origin require no quotation marks.

The same is true of colloquialisms and slang.

References.
In scholarly work requiring exact references, abbreviate titles that occur frequently, giving the full forms in an alphabetical list at the end. As a general practice, give the references in parenthesis or in footnotes, not in the body of the sentence. Omit the words act, scene, line, book, volume, page, except when referring by only one of them. Punctuate as indicated below.

Titles.
For the titles of literary works, scholarly usage prefers italics with capitalized initials. The usage of editors and publishers varies, some using italics with capitalized initials, others using Roman with capitalized initials and with or without quotation marks. Use italics (indicated in manuscript by underscoring), except in writing for a periodical that follows a different practice. Omit initial A or The from titles when you place the possessive before them.