In a report or research paper reference placed at the end of is called a?

A reference placed at the end of a report or research paper is called a citation. Citations provide information about the sources used in the research and allow readers to verify the accuracy and validity of the information presented in the paper. Citations typically include the author's name, year of publication, title of the work, publisher, and page numbers (if applicable). The specific format of citations may vary depending on the referencing style used, such as APA, MLA, or Chicago style. Following a consistent referencing style ensures that the sources are properly acknowledged and makes it easy for readers to find and access the original sources used in the research.