APA (7th ed.) Citation

Busch, D. D. (2009). David Busch's Canon EOS 50D guide to digital SLR photography. Course Technology PTR.

Chicago Style (17th ed.) Citation

Busch, David D. David Busch's Canon EOS 50D Guide to Digital SLR Photography. Boston, MA: Course Technology PTR, 2009.

MLA (9th ed.) Citation

Busch, David D. David Busch's Canon EOS 50D Guide to Digital SLR Photography. Course Technology PTR, 2009.