(1930). Black Guillemot (Cepphus grylle) at Cape May, N. J. The Auk, 47(2), 242.
Chicago Style (17th ed.) Citation"Black Guillemot (Cepphus Grylle) at Cape May, N. J." The Auk 47, no. 2 (1930): 242.
MLA (9th ed.) Citation"Black Guillemot (Cepphus Grylle) at Cape May, N. J." The Auk, vol. 47, no. 2, 1930, p. 242.
Warning: These citations may not always be 100% accurate.