How To Draw a Head From Different Angles

I've just drew this a few months back, and it really helped me out I hope it's helpful to you guys too.
I've used Photoshop it's a rough sketch, with the axis and stuff still shown as I thought it would be easier to understand the proportions and I took a few of references before I started this and I suggest everyone does the same for better understanding.

feel free to leave a comment.....

cheers!!!!