When typing, book titles—in fact, the titles of any full-length works—should always be italicized. Titles of shorter works, such as a poem or short story, should be put in quotation marks. You should only underline the titles of full-length works if your essay is handwritten (as italics aren't an option).

Are book titles supposed to be underlined?

Titles of books, plays, films, periodicals, databases, and websites are italicized. Place titles in quotation marks if the source is part of a larger work. Articles, essays, chapters, poems, webpages, songs, and speeches are placed in quotation marks.

Which titles should be underlined?

Use underlining or italics, but not both. REMINDER The titles of creative works such as books, movies, works of art, songs, articles, and poems are capitalized. NOTE The titles of poems, songs, short stories, essays, and articles are not underlined or italicized. These titles are set off in quotation marks.