A Wikipedia article is essentially just a webpage, so you should reference it in the same way you would usually reference a webpage. For Harvard style this is as follows: First, locate these details for the article: article title, published date, access date, article URL (web address).

Structure to follow to cite a Wikipedia article in Harvard style: ‘Article title’ (Year last updated) Website Title. Available at: URL (Accessed: Day Month Year). Reference example: ‘Special relativity’ (2018) Wikipedia.