APA (7th ed.) Citation

Neill, W., & Hepburn, D. (2007). Butterflies of the Pacific Northwest. Mountain Press Pub. Co..

Chicago Style (17th ed.) Citation

Neill, William, and Doug Hepburn. Butterflies of the Pacific Northwest. Missoula, Mont.: Mountain Press Pub. Co., 2007.

MLA (8th ed.) Citation

Neill, William, and Doug Hepburn. Butterflies of the Pacific Northwest. Mountain Press Pub. Co., 2007.

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