Skutch, A. F. (1999). Helpers at birds' nests: A worldwide survey of cooperative breeding and related behavior (An expanded ed.). University of Iowa Press.
Chicago-Zitierstil (17. Ausg.)Skutch, Alexander F. Helpers at Birds' Nests: A Worldwide Survey of Cooperative Breeding and Related Behavior. An expanded ed. Iowa City, Iowa: University of Iowa Press, 1999.
MLA-Zitierstil (9. Ausg.)Skutch, Alexander F. Helpers at Birds' Nests: A Worldwide Survey of Cooperative Breeding and Related Behavior. An expanded ed. University of Iowa Press, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.