APA (7th ed.) Citation

König, C., Weick, F., & Becking, J. (1999). Owls: A guide to the owls of the world. Pica Press.

Chicago Style (17th ed.) Citation

König, Claus, Friedhelm Weick, and Jan-Hendrik Becking. Owls: A Guide to the Owls of the World. East Sussex: Pica Press, 1999.

MLA (9th ed.) Citation

König, Claus, et al. Owls: A Guide to the Owls of the World. Pica Press, 1999.