If your cited information is from the Homepage (first or introductory page) of a Web site then reference as a website. However if the citation is for a part, or a specific page of a website then use how to reference a webpage.
A citation to a web site/web page is made mainly from the information found on the homepage.
It can often be difficult to identify the author of a web-page. If this is the case use the organisation (e.g. BBC) in place of the author.
If a website has no discernible author or organisation you may want to strongly consider whether it is suitable for inclusion in a piece of academic writing! Again it is probably best to check with the person who will be assessing your work, if you find yourself in this situation.
The URL does not have a full stop after it unless in ends in a forward slash - / or more information follows it such as a DOI number.