Cita APA (7th ed.)
König, K., Weick, F., & Wink, M. (2008). Owls of the world (2nd ed.). Christopher Helm.
Cita Chicago (17th ed.)
König, Klaus, Friedhelm Weick, i Michael Wink. Owls of the World. 2nd ed. London: Christopher Helm, 2008.
Cita MLA (9th ed.)
König, Klaus, et al. Owls of the World. 2nd ed. Christopher Helm, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.