APA (7th ed.) Citation

Black, C. T. (1941). Gyrfalcon in Wisconsin. The Auk, 58(2), 254.

Chicago Style (17th ed.) Citation

Black, C. T. "Gyrfalcon in Wisconsin." The Auk 58, no. 2 (1941): 254.

MLA (9th ed.) Citation

Black, C. T. "Gyrfalcon in Wisconsin." The Auk, vol. 58, no. 2, 1941, p. 254.