Be careful! Just because you found something on the web, it doesn’t mean you are citing a website.
Look at the material closely – is it a journal article? A newspaper article? An encyclopedia? An eBook? Use the format that best describes the item. APA treats a source as a website only when it does not fit another category.
It can sometimes be difficult to find out who the author of a website is. Remember that an author can be a corporation or group, not only a specific person. Author information can sometimes be found under an "About" section on a website.
If there is no known author, start the citation with the title of the website instead.
The best date to use for a website is the date that the content was last updated. Otherwise look for a copyright or original publication date. Unfortunately this information may not be provided or may be hard to find. Often date information is put on the bottom of the pages of a website.
If you do not know the complete date, put as much information as you can find. For example you may have a year but no month or day.