Correll, R. (2012). Photo restoration and retouching using Corel Paintshop Pro X4 (3rd ed.). Course Technology.
Chicago-Zitierstil (17. Ausg.)Correll, Robert. Photo Restoration and Retouching Using Corel Paintshop Pro X4. 3rd ed. Boston, MA: Course Technology, 2012.
MLA-Zitierstil (9. Ausg.)Correll, Robert. Photo Restoration and Retouching Using Corel Paintshop Pro X4. 3rd ed. Course Technology, 2012.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.