Why Use Websites?
"Can I use websites in academic study?
The short answer is "yes - but you must use them appropriately".
Websites can provide valuable evidence to support your discussion, just like books or paper journals. For instance, many authoritative sources such as academic institutions, government and research bodies, or charities use the internet to make important data available as quickly and freely as possible. Journal articles are also often available online, and an increasing number of journals are only available electronically.
However, unlike academic books and journals which are usually peer-reviewed before being published, websites can potentially be written by anyone. So you do need to spend more time assessing their reliability." (University of Reading)