The document discusses the American Psychological Association (APA) style for citing references and formatting papers. APA style provides guidelines for formatting papers, citing references in-text, and constructing reference lists. It describes an author-date citation system where references are listed alphabetically by author's last name and date. Examples are provided for citing different source types, such as books, journal articles, and websites, both in-text and in the reference list. Key components of reference list entries are identified for different source formats.