Citation, Documentation of Sources

Q. I have scoured the CMOS website and searched online, but I am stymied. I have quoted someone’s Twitter bio. How do I cite it?? Please help.

Q. In a parenthetical citation that includes volume and page number, what’s the correct way to style subsequent, nonconsecutive page numbers from the same volume? Should the volume be stated only once, like so: (Barnes 1998, 2:354–55, 370, 381)? Or should the volume number be repeated at the start of each page number, like so: (Barnes 1998, 2:354–55, 2:370, 2:381)? I’m unable to find an example like this in the Manual. Guidance much appreciated!

Q. In a book with multiple authors, if I cite different chapters (different authors) do I need to repeat the book’s full publication details each time?

Q. For my Chicago author-date reference list following a paper: When listing a journal article, what do I do if there is no page range? I have an article number—does this come into use?

Q. When citing the recto and verso side of a folio page, I was curious as to which abbreviation was correct: fol. 1r–v, or fols. 1r–v. I had presumed it was the former because one folio has a recto and verso side, but I found a lot of precedent for the plural in publications from the University of Chicago Press and other reputable academic presses (including Cambridge and Oxford). Is one of these options preferred, or are both correct? Thanks for your help with this.

Q. I have a question about author-date citation style in a sentence that mentions both the author’s name and the title of the work in question: “As philosopher Helen Small argues in The Long Life, there is a general ‘hiddenness’ of aging and becoming older in the history of Western philosophy.” Is it necessary to include a narrative citation here—“As philosopher Helen Small (2007) argues . . .”—or is the sentence as it originally stands enough?

Q. How would you cite marginalia in a published item in footnotes and bibliography? I want to reference a published nineteenth-century auction catalog that has handwritten purchase prices and buyers’ names. The catalog is now held in a public library so has a shelf number. With thanks.

Q. In reference lists, noun forms such as “editor” (ed.) and “translator” (trans.) are always abbreviated. The abbreviation of the plural “editors” is “eds.” But what is the abbreviation of plural “translators”? “Trans.” or “transs.”?

Q. Try as I might, I cannot find anything in CMOS about whether to include first edition statements in a bibliography. There is a section on “editions other than the first,” which makes me think including statements of first editions is unnecessary. What say you?

Q. While developing a bibliography, I came across a book whose title was different for the first edition than for later editions. How should this be indicated in a bibliography?