The last step shows you how to position the top edge pieces to complete the cube
The second to last step will show you how to position the corners of the last layer.
This step shows you how to completely finish the yellow top face.
This video explains how to place a yellow cross on the top layer of the cube.
A tutorial on how to place the 4 middle edge pieces to complete two layers of the cube.
The second step of the tutorial which explains how to place the 4 bottom white corner pieces.
This is the first step of the tutorial, which explains how to form the bottom white cross.