APA (7th ed.) Citation

Svensson, L., Zetterström, D., & Mullarney, K. (2009). Collins bird guide (2. baskı.). Harper Collins.

Chicago Style (17th ed.) Citation

Svensson, Lars, Dan Zetterström, and Killian Mullarney. Collins Bird Guide. 2. baskı. Harper Collins, 2009.

MLA (9th ed.) Citation

Svensson, Lars, et al. Collins Bird Guide. 2. baskı. Harper Collins, 2009.