How do you cite an article from a website?

How do you cite an article from a website? I think my instructor is doing it wrong. She told the class to do it like this, and I don’t think this is 6th Edition format! She wants us to do it as follows for the module readings. I don’t think the title is supposed to be in italics. Does this look right? Not sure.

Argosy University Online (2017). Research terminology.  Retrieved from

http://myeclass.com

If I cite more than one page from the readings in a single assignment, she wants it like this:  Argosy University Online (2017a). Student behavior. Retrieved 

from http://myeclass.com

Argosy University Online (2017b). Using CogLab. Retrieved from

http://myeclass.com

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