Normally, what title is written in italics?

A general rule of style with understanding whether to italicize a title or not is determining whether the text or work is an entire work (such as a whole book) rather than a portion of a larger work (such as an article in a newspaper, a book chapter, or one song from an opera). The titles of all of the following are generally book titles; magazine, newspapers, and journal titles; film titles; titles of plays, musicals, and other musical works such as operas; works of art, such as paintings; and sometimes certain speeches and poems - usually those that are longer and/or more distinguished.