APA (7th ed.) Citation

Willett, G. (1920). Additional Notes on the Avifauna of Forrester Island, Alaska. The Condor, 22(4), 138.

Chicago Style (17th ed.) Citation

Willett, George. "Additional Notes on the Avifauna of Forrester Island, Alaska." The Condor 22, no. 4 (1920): 138.

MLA (9th ed.) Citation

Willett, George. "Additional Notes on the Avifauna of Forrester Island, Alaska." The Condor, vol. 22, no. 4, 1920, p. 138.