Closing Quotation Marks in Relation to Other Punctuation: 6.8. Period and commas, in The Chicago Manual of Style, 15th, U. of Chicago Pr, agosto 2003, p. 242, ISBN 978-0-321-11583-6.
«For related matters in computer writing, see Eric S. Raymond, "Hacker Writing Style," in The New Hacker's Dictionary (bibliog. 5).»