When citing sources in APA format, use the author-date method. Jones (1998), for example, and a complete citation should be supplied in the paper's reference list. In addition to the writer and date, each source must include a title for the work being cited. This is usually the book or article's title, but it can also be a section or chapter number if one is used. For example, "John Jones wrote an article on presidential power." The reader would then look up "John Jones" in the bibliography or reference list to find more information about the source. Citations are meant to provide additional information about the source. Therefore, only include details that will help readers understand the source's relevance to the paper's topic or argument. In this case, including the entire title of John Jones' article would be excessive because readers wouldn't need it to evaluate the source's quality or significance. Instead, mention that John Jones wrote an article on presidential power and indicate that this piece is relevant by explaining what kind of power is being discussed (i.e., executive power). It is important to note that not all sources require a title. For example, newspaper articles are commonly referenced without a title because they can be identified by date and location of publication.