APA (7th ed.) Citation
Koers, D. (2005). Paint shop pro 9: Photographers' guide. Course Technology PTR.
Chicago Style (17th ed.) Citation
Koers, Diane. Paint Shop Pro 9: Photographers' Guide. Boston, MA: Course Technology PTR, 2005.
MLA (9th ed.) Citation
Koers, Diane. Paint Shop Pro 9: Photographers' Guide. Course Technology PTR, 2005.
Warning: These citations may not always be 100% accurate.