The document discusses referencing and citation styles when writing academic papers. It covers why citations are important, which is to avoid plagiarism and show the research done. It also discusses what to cite, such as author, title, publisher, date. The two main styles covered are notes/bibliography style where sources are cited in footnotes and a bibliography, and author/date style where sources are cited parenthetically in text and included in a reference list. The document provides examples of citations in these styles according to different standards like Chicago, MLA and GOST.