How do I add Amazon Associates to my Google Sites?

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I've got a website at Google Sites and I want to advertise Amazon.com products with Amazon Associates. I signed up for it fine, but I don't see how to moneytize my site with it... it shows a place for Google adsense, but I want to have amazon products on my site. I know it can be done.. or at least I heard it can be done. Can anyone guide me on how to do this? Much appreciated if you do.