(1974). A Pleistocene Gyrfalcon. The Auk, 91(4), 820.
Chicago Style (17th ed.) Citation"A Pleistocene Gyrfalcon." The Auk 91, no. 4 (1974): 820.
MLA (9th ed.) Citation"A Pleistocene Gyrfalcon." The Auk, vol. 91, no. 4, 1974, p. 820.
Warning: These citations may not always be 100% accurate.