Can i use this link to link directly to amazon cart?

I use my own button instead of using amazon button like on this tutorial

https://affiliate-program.amazon.com/gp/associates/help/t1/a10

So, can i use link below for my 'buy now' button to link directly to amazon cart?

http://www.amazon.com/gp/aws/cart/add.html?AssociateTag=my-tag-here-20&ASIN.1=B0057GUV1A&Quantity.1=1