APA (7th ed.) Citation

(2003). 40 digital photo retouching techniques. Youngjin.com Inc.

Chicago Style (17th ed.) Citation

40 Digital Photo Retouching Techniques. Seoul, Korea: Youngjin.com Inc, 2003.

MLA (9th ed.) Citation

40 Digital Photo Retouching Techniques. Youngjin.com Inc, 2003.

Warning: These citations may not always be 100% accurate.