APA (7th ed.) Citation

Hofmann, H., Marktanner, T., & Pont, A. (1995). Butterflies and moths of Britain and Europe. Harper Collins.

Chicago Style (17th ed.) Citation

Hofmann, Helga, Thomas Marktanner, and Adrian Pont. Butterflies and Moths of Britain and Europe. [Χ.τ.]: Harper Collins, 1995.

MLA (8th ed.) Citation

Hofmann, Helga, et al. Butterflies and Moths of Britain and Europe. Harper Collins, 1995.