Within the text of an article or review, follow CMS16, 8.167–68:
NB: This rule does not apply to the titles of books and musical compositions:
But when syntax makes the initial "the" impractical, omit it:
"Since" in titles: Capitalize if a conjunction, but use lower case if a preposition.
In running text, omit the initial article for English-language titles of books if it does not fit the surrounding syntax (CMS16, 8.167), but retain it for foreign-language titles of newspapers and periodicals (CMS16, 8.168).
For titles within titles: If the title is in roman (for example, the head citation for a review), use italics for the internal title; if the title is in italics, surround the internal title with quotation marks.
Numbers and ampersands (&) in titles (see CMS16, 8.163):
For titles of hymntunes, use upper case with small caps after initial letter:
This hymn melody is commonly called DYING STEPHEN. (not "Dying Stephen")
Titles of medieval and Renaissance works are in italics unless the piece (such as a madrigal, motet, or chanson) is part of a larger collection also mentioned in the review or article; then use quotation marks:
For tempo indications used as titles of movements, capitalize the first word, and in most cases use roman type: