This document discusses different styles of referencing used in academic writing. It outlines six common styles - Harvard, APA, Vancouver, MLA, Chicago and Royal Society of Chemistry. Each style has different conventions for formatting in-text citations and reference lists, such as whether to include the author's initials, use of quotation marks and italics. The purpose of referencing is to give credit to other authors, prove research was conducted, and avoid plagiarism. The conclusion reiterates that authors should select a standard style to present references.