What Is This? Throughout this book, you will find parenthetical notes like this one. These citations tell you the source of research or findings being discussed, in this case a book published by Stanovich in 2013. If you want to know more about a topic, you can look up the source and read the original article or book. Information provided in this brief citation allows you to locate the full reference in the alphabetized reference list at the back of the textbook: Look for Stanovich, K. E. (2013) on page R-41. There are many systems and formats for citing sources, but this textbook uses the APA style established by the American Psychological Association (APA, 2010c).