Skutch, A. F., & Gardner, D. (1987). Helpers at birds' nests: A worldwide survey of cooperative breeding and related behavior (First edition.). University of Iowa Press.
Chicago Style (17th ed.) CitationSkutch, Alexander F., and Dana Gardner. Helpers at Birds' Nests: A Worldwide Survey of Cooperative Breeding and Related Behavior. First edition. Iowa City: University of Iowa Press, 1987.
MLA (9th ed.) CitationSkutch, Alexander F., and Dana Gardner. Helpers at Birds' Nests: A Worldwide Survey of Cooperative Breeding and Related Behavior. First edition. University of Iowa Press, 1987.
Warning: These citations may not always be 100% accurate.