In an essay formatted in APA style, the title of a book also appears in italics. Additionally, any words in the title that are four letters or longer should be capitalized. Italicization is also required for edited collections of short stories and essays, movies, television series, documentaries and albums. Purdue University Online Writing Lab.
Prior to computers, people were taught to underline titles of books and plays and to surround chapters, articles, songs, and other shorter works in quotation marks. However, here is what The Chicago Manual of Style says: When quoted in text or listed in a bibliography, titles of books, journals, plays, and other freestanding works are.