Different types of media, including books, pamphlets, journals and anthologies, are listed in a bibliography. Bibliographic entries differ based on the type of media being listed. Yet, the title of any particular piece is always set off in one of two ways -- with quotation marks or italics. Knowing when to use italics is a matter of knowing what kind of publication you are citing.
Italicize Stand-alone Media
A title is italicized when it is an item that stands on its own as a separate entity. This includes the titles of novels, magazines, films, plays, journals, films, anthologies and TV shows. However, the title of something appearing within a larger volume, such as a TV show episode or an article in a magazine, should be in quotation marks, not italicized. Sometimes it depends on how the item was originally published. Most poem titles, for example, are in quotation marks because they appear within an anthology of poems. Sometimes, however, a poem is published as its own book, such as T.S. Elliot's "The Wasteland" or Allen Ginsberg's "Howl," and should be italicized. It should be noted also that the names of holy books, like the Bible and the Koran, are simply capitalized -- no italics and no quotation marks.