Correll, R. (2008). Photo restoration and retouching using Corel Paint Shop Pro Photo: Learn how to rescue old photos and improve your digital pictures! Thomson Course Technology PTR.
Chicago-viite (17. p.)Correll, Robert. Photo Restoration and Retouching Using Corel Paint Shop Pro Photo: Learn How to Rescue Old Photos and Improve Your Digital Pictures! Boston, MA: Thomson Course Technology PTR, 2008.
MLA-viite (9. p.)Correll, Robert. Photo Restoration and Retouching Using Corel Paint Shop Pro Photo: Learn How to Rescue Old Photos and Improve Your Digital Pictures! Thomson Course Technology PTR, 2008.
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