Square Foot Gardening Book, which is 4 cubic feet of peat moss, 4 cubic feet of mixed compost, and 4 cubic feed of vermiculite. The vermiculite was the hardest to find, it took me a while to finally find it. Luckily my local nursery (Woody's Nursery) got some in stock the day I had decided to finally build the raised bed. The hardest part was mixing the ingredients, they got quite heavy, and Antonio was only able to help so much.
Square Foot Raised Bed by following its link to MyFolia website.