APA (7th ed.) Citation
Powell, J. A., & Opler, P. A. (2009). Moths of Western North America. University of California Press.
Chicago Style (17th ed.) Citation
Powell, Jerry A., and Paul A. Opler. Moths of Western North America. Berkeley: University of California Press, 2009.
MLA (9th ed.) Citation
Powell, Jerry A., and Paul A. Opler. Moths of Western North America. University of California Press, 2009.
Warning: These citations may not always be 100% accurate.