Software programs can help you cite sources in your papers. In these programs you create a database of literature references which you can use when you make your paper or manuscript in Microsoft Word. These programs integrate in your word processor. They help you cite your sources in the text and provide consistency between cited sources in the text and references in the list at the end of your paper. They work for APA style, but also for other styles. Well known programs are EndNote, Mendeley and Zotero.