APA (7th ed.) Citation

Cleghorn, M. (2008). Photoshop in a weekend / Mark Cleghorn. Photographers' Institute.

Chicago Style (17th ed.) Citation

Cleghorn, Mark. Photoshop in a Weekend / Mark Cleghorn. Lewes: Photographers' Institute, 2008.

MLA (9th ed.) Citation

Cleghorn, Mark. Photoshop in a Weekend / Mark Cleghorn. Photographers' Institute, 2008.

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