The document discusses various referencing styles used in academic writing. It defines referencing as acknowledging other people's work and explains that there are standardized methods of formatting sources to avoid plagiarism. Some major styles covered include Harvard, APA, MLA, and Chicago styles. For each style, the document outlines the general formatting for in-text citations and reference lists, such as author name, date, title, publisher. It distinguishes between a reference list of cited sources and a bibliography of all consulted works. Referencing allows readers to access sources and gives proper credit while supporting arguments.