Quotations in an essay.

I'm writing an argumentative essay over a controversial topic.

I'm quoting a website, here's the quote;

"In fact, according to a May 2006 study conducted by the Entertainment Software Association, an industry group, the average gamer in the U.S. is 33 years old. Less than a third of all gamers are 18 years old or younger, while a quarter of them are over the age of 50."

If I used that in my paper would I put the quotation marks around it AND use internal documentation, or would I only quote or only internally cite it?

I'm not sure about all the quoting/citing stuff in essays. :/

 

Do you know how to use the harvard referencing system?

If not, it's simple and widely accepted. Use this.