APA (7th ed.) Citation

Quinn, M., & Klym, M. (2009). An introduction to butterfly watching (Rev. June 2009.). Texas Parks & Wildlife.

Chicago Style (17th ed.) Citation

Quinn, Mike, and Mark Klym. An Introduction to Butterfly Watching. Rev. June 2009. Austin, Tex.: Texas Parks & Wildlife, 2009.

MLA (9th ed.) Citation

Quinn, Mike, and Mark Klym. An Introduction to Butterfly Watching. Rev. June 2009. Texas Parks & Wildlife, 2009.