APA
Colwell, R. K. (1989). Hummingbirds of the Juan Fern{\'a}ndez Islands: natural history, evolution and population status. Ibis, 131, 548–566.
Chicago/Turabian
Colwell, RK. “Hummingbirds of the Juan Fern{\'a}Ndez Islands: Natural History, Evolution and Population Status.” Ibis 131 (1989): 548–566.
MLA
Colwell, R. K. “Hummingbirds of the Juan Fern{\'a}Ndez Islands: Natural History, Evolution and Population Status.” Ibis, vol. 131, Blackwell Publishing Ltd (NOTE: that the names of the birds in the Abstract~…, 1989, pp. 548–66.