A citation is a mention of a specific source within your text and is often called an in-text citation. You cite a source in your text whenever you refer to one and you provide enough information - usually this is the surname of the author and the year of publication e.g. (Smith, 1999) - to identify it in your reference list,
In a reference list each reference contains sufficient information about a source mentioned within your text for readers to go and find the source. References are listed at the end of your text in alphabetical order and include information like author, title, publisher, date of publication, etc, though the information you include will depend upon the type of source you're using.
Every in-text citation requires a reference list entry and every reference list entry should be cited in the text at least once
