15 Layer Masks Tips for Photoshop CC - Australian Photography
Understanding Layer Masks In Photoshop
5 Layer Mask Tricks in Photoshop CS6
Photoshop Tutorial: Using layer masks to remove parts of an image - YouTube
How to use Photoshop layer masks - 99designs
Creating a mask > Masks and Channels in Adobe Photoshop CS6 | Adobe Press
Amazon.com: Adobe Photoshop CS5 for Photographers: A professional image editor's guide to the creative use of Photoshop for the Macintosh and PC: 8601405949349: Evening, Martin: Books