The APA requires a reference page, rather than a works cited page, for listing the sources you used for your summary . Center the word "References" on your reference page, but don't bold or italicize it. Order your entries alphabetically by the author's last name -- flush left the first line and indent following lines. Put a double space between references. If you're summarizing a specific book, poem or article, the original text might be the only reference you need. However, if you're summarizing Jane Austen's views of marriage, you might include several of her books and accompanying study guides in your reference page.