b6.1. Always use quotation marks with any direct quotation, whether it is a full sentence or a fragment used as part of another sentence.
b6.2. Use quotation marks with words used in an ironic sense (the "quality" of the May vintage Boone's Farm) or with unfamiliar words (Barthes' analysis used the concept of "semiotics"). In the latter case, use only on first reference. BUT FOR WORDS USED AS WORDS or SPECIAL TERMS in a discussion, use italics on first use and roman thereafter.
b6.3. Do not use quotation marks with text excerpts of more than three lines or in a question-and-answer format.
b6.4. Alternate between double quotation marks and single quotation marks when using quotations within quotations: "Blanche told me, `I really like "The Varsouviana Waltz," ' and I had to agree," Stella said.
b6.5. Periods and commas always go inside quotation marks. Colons, semicolons, dashes, question marks and exclamation points go outside unless a part of the direct quotation: "Are you sure?" he asked. "Yes, but-" she responded. But: Have you read "Babylon Revisited"? That was almost as good as "The Simpsons"!