APA (7th ed.) Citation

Chester, J., & Kallen, C. (2004). Extreme digital photography. Course PTR.

Chicago Style (17th ed.) Citation

Chester, Jonathan, and Christian Kallen. Extreme Digital Photography. Boston: Course PTR, 2004.

MLA (9th ed.) Citation

Chester, Jonathan, and Christian Kallen. Extreme Digital Photography. Course PTR, 2004.

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